JP7423044B2 - Optical system - Google Patents
Optical system Download PDFInfo
- Publication number
- JP7423044B2 JP7423044B2 JP2019213387A JP2019213387A JP7423044B2 JP 7423044 B2 JP7423044 B2 JP 7423044B2 JP 2019213387 A JP2019213387 A JP 2019213387A JP 2019213387 A JP2019213387 A JP 2019213387A JP 7423044 B2 JP7423044 B2 JP 7423044B2
- Authority
- JP
- Japan
- Prior art keywords
- lph
- refractive power
- lens group
- positive refractive
- lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 title claims description 230
- 230000014509 gene expression Effects 0.000 claims description 235
- 239000006185 dispersion Substances 0.000 claims description 38
- 230000005499 meniscus Effects 0.000 description 72
- 230000004075 alteration Effects 0.000 description 70
- 238000010586 diagram Methods 0.000 description 43
- 230000000694 effects Effects 0.000 description 23
- 238000003384 imaging method Methods 0.000 description 21
- 239000000463 material Substances 0.000 description 18
- 239000011521 glass Substances 0.000 description 17
- 239000002131 composite material Substances 0.000 description 9
- 230000002547 anomalous effect Effects 0.000 description 7
- 241000511976 Hoya Species 0.000 description 6
- 201000009310 astigmatism Diseases 0.000 description 6
- 239000013585 weight reducing agent Substances 0.000 description 6
- 101150083238 bsc7 gene Proteins 0.000 description 5
- 206010010071 Coma Diseases 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
Images
Landscapes
- Lenses (AREA)
Description
本発明はスチルカメラ、ビデオカメラ等の撮像装置や望遠鏡などに用いるレンズに好適な光学系に関し、色収差を効果的に補正しながら、軽量化に寄与するように適切な配置を行ったものである。 The present invention relates to an optical system suitable for lenses used in imaging devices such as still cameras and video cameras, and telescopes, and is appropriately arranged to contribute to weight reduction while effectively correcting chromatic aberration. .
近年デジタルカメラ等の高画素化に伴い、用いられる光学系に対して諸収差を厳しく補正することが求められるようになってきている。 In recent years, with the increase in the number of pixels in digital cameras and the like, it has become necessary to strictly correct various aberrations in the optical systems used.
また、特に望遠系の交換レンズや望遠鏡に用いられる光学系においては、含まれるレンズを軽量化もしくは鏡筒を小型化することが望まれている。 In addition, particularly in optical systems used in telephoto interchangeable lenses and telescopes, it is desired to reduce the weight of the lenses included or to reduce the size of the lens barrel.
そこで、従来提案されてきた望遠系の光学系においては、物体側近辺の正の屈折力を有するレンズの材料として、商品名ＦＣ５（ＨＯＹＡ社製）やＢＳＣ７（ＨＯＹＡ社製）などに相当する、摩耗度が低く軽量なガラス材料を使用するものが提案されていた。 Therefore, in telephoto optical systems that have been proposed in the past, materials such as FC5 (manufactured by HOYA) and BSC7 (manufactured by HOYA), etc., are used as materials for lenses with positive refractive power near the object side. It has been proposed to use a lightweight glass material with low abrasion.
特許文献１において、最も物体側の正の屈折力を有するレンズに、商品名ＢＳＣ７（ＨＯＹＡ社製）に相当するガラス材料を使用した望遠光学系が提唱されている。しかしながらＢＳＣ７に相当するガラス材料は屈折力が十分でないため、像側の光束の径を収斂させる効果が乏しく、像側のレンズの径が拡大し、結果的に小型化や軽量化に寄与していない。また、ＢＳＣ７に相当するガラス材料は、可視波長域の短波長側（ｇ線―Ｆ線間）の色収差を補正する効果が十分でない。 Patent Document 1 proposes a telephoto optical system using a glass material corresponding to the trade name BSC7 (manufactured by HOYA) for a lens having a positive refractive power closest to the object side. However, since the glass material equivalent to BSC7 does not have sufficient refractive power, it is not effective in converging the diameter of the light beam on the image side, and the diameter of the lens on the image side increases, which ultimately contributes to miniaturization and weight reduction. do not have. Further, the glass material corresponding to BSC7 does not have a sufficient effect of correcting chromatic aberration on the short wavelength side of the visible wavelength range (between the g-line and the F-line).
特許文献２において、最も物体側の正の屈折力を有するレンズに、商品名ＦＣＤ１００（ＨＯＹＡ社製）に相当するガラス材料を使用した望遠光学系が提唱されている。しかしながらＦＣＤ１００に相当するガラス材料は屈折力が十分でないため、像側の光束の径を収斂させる効果が乏しく、像側のレンズの径が拡大し、小型化や軽量化に寄与していない。 Patent Document 2 proposes a telephoto optical system using a glass material corresponding to the product name FCD100 (manufactured by HOYA) for a lens having a positive refractive power closest to the object side. However, since the glass material corresponding to the FCD 100 does not have sufficient refractive power, it has a poor effect of converging the diameter of the light beam on the image side, and the diameter of the lens on the image side increases, which does not contribute to miniaturization and weight reduction.
特許文献３において、最も物体側の正の屈折力を有するレンズに、商品名ＴＡＦＤ５５（ＨＯＹＡ社製）やＴＡＦＤ４５（ＨＯＹＡ社製）に相当するガラス材料を使用した望遠光学系が提唱されている。しかしながらＴＡＦＤ５５やＴＡＦＤ４５に相当するガラス材料はＢＳＣ７やＦＣＤ１００などと比べ比重が大きいため、軽量化に寄与していない。また、ＴＡＦＤ５５やＴＡＦＤ４５に相当するガラス材料は、可視波長域の短波長側（ｇ線―Ｆ線間）の色収差を補正する効果が十分でない。 Patent Document 3 proposes a telephoto optical system using a glass material corresponding to the trade names TAFD55 (manufactured by HOYA) and TAFD45 (manufactured by HOYA) for a lens having a positive refractive power closest to the object side. However, glass materials equivalent to TAFD55 and TAFD45 have a higher specific gravity than BSC7 and FCD100, so they do not contribute to weight reduction. Further, the glass material corresponding to TAFD55 and TAFD45 does not have a sufficient effect of correcting chromatic aberration on the short wavelength side (between g-line and F-line) in the visible wavelength range.
本発明は、レンズ材料を適切に配置することで、色収差などの諸収差を補正しつつ小型化や軽量化を達成した光学系を提供する事を目的とする。 An object of the present invention is to provide an optical system that achieves reduction in size and weight while correcting various aberrations such as chromatic aberration by appropriately arranging lens materials.
上記課題を解決するための手段である第１の発明は、物体側より順に、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記開口絞りＳに隣接した正の屈折力を有するレンズ群ＧＦが合焦の際に移動し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が、最も物体側に配置されることを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
The first invention, which is a means for solving the above problems, is composed of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB. , the front lens group GA has three or more lenses with positive refractive power and one or more lenses with negative refractive power, and the front lens group GA satisfies the following conditional expressions (1) and (2). At least one lens LPH having positive refractive power satisfies the following conditional expression (3), and the following conditional expression ( 4) The lens group GF having positive refractive power adjacent to the aperture stop S moves during focusing, and at least one of the lenses LPH having positive refractive power is positioned closest to the object side. An optical system characterized by being arranged .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
また、第２の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７´）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記負の屈折力を有するレンズＬＮが、前記前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７´）ＶＤ＿ＬＮ ＜ ２６．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第３の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´´）満足し、前記前側レンズ群ＧＡは以下の条件式（７´´）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記負の屈折力を有するレンズＬＮが、前記前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ＜ ＶＤ＿ＬＰＬ
（７´´）ＶＤ＿ＬＮ ＜ ２８．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
Further, the second invention includes, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (4). A lens LN having a negative refractive power that satisfies conditional expression (7') and conditional expression (8), and the lens LN having the negative refractive power is included in the front lens group GA and has a negative refractive power. An optical system characterized by having the strongest negative refractive power among lenses having.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7')VD_LN < 26.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Further, the third invention is composed of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and the front lens group GA is It has a lens LN having a negative refractive power that satisfies the following conditional expression (7'') and conditional expression (8), and the lens LN having the negative refractive power is a negative lens included in the front lens group GA. An optical system characterized by having the strongest negative refractive power among lenses having refractive power.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 < VD_LPL
(7'')VD_LN < 28.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
また、第４の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記負の屈折力を有するレンズＬＮが、前記前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有することを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜
０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第５の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２´）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´´）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記負の屈折力を有するレンズＬＮが、前記前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有することを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜
０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
Further, the fourth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. It has three or more lenses, one or more lenses with negative refractive power, and the front lens group GA includes a lens LPH with positive refractive power that satisfies the following conditional expressions (1') and (2). At least one of the lenses LPH having one or more lenses and having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4'), and the front lens group GA is It has a lens LN having a negative refractive power that satisfies the following conditional expressions (7) and (8), and the lens LN having the negative refractive power is a negative refractive power included in the front lens group GA. An optical system characterized by having the strongest negative refractive power among lenses with power.
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <
0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Further, the fifth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. A lens LPH having three or more lenses, one or more lenses having a negative refractive power, and the front lens group GA having a positive refractive power satisfying the following conditional expressions (1') and (2') At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and the front lens group GA has a lens LN having a negative refractive power that satisfies the following conditional expressions (7) and (8), and the lens LN having the negative refractive power is a negative lens included in the front lens group GA. An optical system characterized by having the strongest negative refractive power among lenses having refractive power.
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <
0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
また、第６の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、合焦の際に前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが移動し、合焦の際にさらに、前記レンズ成分ＬＦの像面側に配置された正の屈折力を有するレンズ成分ＬＦＰが、前記レンズ成分ＬＦと別の軌跡に沿って移動することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第７の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記後続レンズ群ＧＢが非球面を有し、合焦の際に前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが移動し、合焦の際にさらに、前記レンズ成分ＬＦの像面側に配置された正の屈折力を有するレンズ成分ＬＦＰが、前記レンズ成分ＬＦと別の軌跡に沿って移動することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
Further, the sixth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (4). A lens LN having a negative refractive power that satisfies conditional expressions (7) and (8) is provided, and a lens component LF having a negative refractive power adjacent to the aperture stop S moves during focusing. , an optical system characterized in that, upon focusing, a lens component LFP having a positive refractive power and disposed on the image plane side of the lens component LF moves along a trajectory different from that of the lens component LF. system.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Moreover, the seventh invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the subsequent lens group GB has an aspherical surface. During focusing, a lens component LF having a negative refractive power adjacent to the aperture stop S moves, and during focusing, a lens component LF having a negative refractive power adjacent to the aperture diaphragm S moves, and a positive refractive power located on the image plane side of the lens component LF moves during focusing. An optical system characterized in that a lens component LFP having refractive power moves along a trajectory different from that of the lens component LF.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
また、第８の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´）満足し、合焦の際に前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが移動し、合焦の際にさらに、前記レンズ成分ＬＦの像面側に配置された正の屈折力を有するレンズ成分ＬＦＰが、前記レンズ成分ＬＦと別の軌跡に沿って移動することを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
また、第９の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２´）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´´）満足し、合焦の際に前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが移動し、合焦の際にさらに、前記レンズ成分ＬＦの像面側に配置された正の屈折力を有するレンズ成分ＬＦＰが、前記レンズ成分ＬＦと別の軌跡に沿って移動することを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
Moreover, the eighth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. It has three or more lenses, one or more lenses with negative refractive power, and the front lens group GA includes a lens LPH with positive refractive power that satisfies the following conditional expressions (1') and (2). At least one of the lenses LPH having one or more lenses and having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4'), and when focusing, the above-mentioned A lens component LF having a negative refractive power adjacent to the aperture stop S moves, and upon focusing, a lens component LFP having a positive refractive power disposed on the image plane side of the lens component LF further moves An optical system characterized by moving along a trajectory different from that of a lens component LF.
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
Further, the ninth invention comprises, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. A lens LPH having three or more lenses, one or more lenses having a negative refractive power, and the front lens group GA having a positive refractive power satisfying the following conditional expressions (1') and (2') At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and when focusing The lens component LF with negative refractive power adjacent to the aperture stop S moves, and upon focusing, the lens component LFP with positive refractive power disposed on the image plane side of the lens component LF moves. , an optical system that moves along a different trajectory from the lens component LF.
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
また、第１０の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´）満足し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
また、第１１の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２´）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´´）満足し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
また、第１２の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７´）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７´）ＶＤ＿ＬＮ ＜ ２６．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第１３の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４´´）満足し、前記前側レンズ群ＧＡは以下の条件式（７´´）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ＜ ＶＤ＿ＬＰＬ
（７´´）ＶＤ＿ＬＮ ＜ ２８．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
Moreover, the tenth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. It has three or more lenses, one or more lenses with negative refractive power, and the front lens group GA includes a lens LPH with positive refractive power that satisfies the following conditional expressions (1') and (2). At least one of the lenses LPH having one or more positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4'), and has the positive refractive power. An optical system characterized in that at least one of the lenses LPH is disposed closest to the object side.
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
Moreover, the eleventh invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. A lens LPH having three or more lenses, one or more lenses having a negative refractive power, and the front lens group GA having a positive refractive power satisfying the following conditional expressions (1') and (2') At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and has the positive refractive power. An optical system characterized in that at least one of the lenses LPH having power is disposed closest to the object side.
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
Further, the twelfth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (4). It has a lens LN having negative refractive power that satisfies conditional expressions (7') and (8), and at least one of the lenses LPH having positive refractive power is disposed closest to the object side. An optical system featuring
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7')VD_LN < 26.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Further, the thirteenth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and the front lens group GA is It has a lens LN having a negative refractive power that satisfies the following conditional expressions (7'') and (8), and at least one of the lenses LPH having a positive refractive power is disposed closest to the object side. An optical system characterized by:
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 < VD_LPL
(7'')VD_LN < 28.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
また、第１４の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記負の屈折力を有するレンズＬＮは、前記前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´）０．３０ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第１５の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが合焦の際に移動し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第１６の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３）を満足し、さらに以下の条件式（４）満足し、前記後続レンズ群ＧＢが非球面を有し、前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが合焦の際に移動し、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が最も物体側に配置されることを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
Moreover, the fourteenth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3'), further satisfies the following conditional expression (4), and the front lens group GA is as follows: The lens LN has a negative refractive power that satisfies conditional expressions (7) and (8), and the lens LN has a negative refractive power that is included in the front lens group GA. An optical system having the strongest negative refractive power among the lenses LPH having the positive refractive power, and at least one of the lenses LPH having the positive refractive power is disposed closest to the object side.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3')0.30 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Moreover, the fifteenth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (4). A lens LN having a negative refractive power that satisfies conditional expressions (7) and (8) is provided, and a lens component LF having a negative refractive power adjacent to the aperture stop S moves during focusing. , an optical system characterized in that at least one of the lenses LPH having positive refractive power is disposed closest to the object side.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Further, the sixteenth invention is configured of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the subsequent lens group GB has an aspherical surface. , a lens component LF having a negative refractive power adjacent to the aperture stop S moves during focusing, and at least one of the lenses LPH having a positive refractive power is disposed closest to the object side. An optical system characterized by:
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
また、第１７の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４´）満足することを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
また、第１８の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１´）および（２´）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４´´）満足することを特徴とする光学系。
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
また、第１９の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７´）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７´）ＶＤ＿ＬＮ ＜ ２６．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第２０の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４´´）満足し、前記前側レンズ群ＧＡは以下の条件式（７´´）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ＜ ＶＤ＿ＬＰＬ
（７´´）ＶＤ＿ＬＮ ＜ ２８．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
Further, the seventeenth invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. It has three or more lenses, one or more lenses with negative refractive power, and the front lens group GA includes a lens LPH with positive refractive power that satisfies the following conditional expressions (1') and (2). At least one of the lenses LPH having one or more positive refractive power satisfies the following conditional expression (3'') and further satisfies the following conditional expression (4'). Optical system.
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
Further, the eighteenth invention is configured of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. A lens LPH having three or more lenses, one or more lenses having a negative refractive power, and the front lens group GA having a positive refractive power satisfying the following conditional expressions (1') and (2') At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3''), and further satisfies the following conditional expression (4''). optical system.
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
Further, the nineteenth invention is configured of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3''), further satisfies the following conditional expression (4), and the front lens group GA is An optical system characterized by having a lens LN having a negative refractive power that satisfies the following conditional expressions (7') and (8).
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7')VD_LN < 26.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Moreover, the 20th invention is composed of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, and the front lens group GA has a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3''), further satisfies the following conditional expression (4''), and the front lens group GA is an optical system characterized by having a lens LN having a negative refractive power that satisfies the following conditional expressions (7'') and (8).
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4'') 70.0 < VD_LPL
(7'')VD_LN < 28.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
また、第２１の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記負の屈折力を有するレンズＬＮは、前記前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第２２の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４）満足し、前記前側レンズ群ＧＡは以下の条件式（７）と条件式（８）を満足する負の屈折力を有するレンズＬＮを有し、前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが合焦の際に移動することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
また、第２３の発明は、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成され、前記前側レンズ群ＧＡは正の屈折力を有するレンズを３枚以上、負の屈折力を有するレンズを１枚以上有し、前記前側レンズ群ＧＡは以下の条件式（１）および（２）を満足する正の屈折力を有するレンズＬＰＨを１枚以上有し、前記正の屈折力を有するレンズＬＰＨのうち少なくとも１枚は以下の条件式（３´´）を満足し、さらに以下の条件式（４）満足し、前記後続レンズ群ＧＢが非球面を有し、前記開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが合焦の際に移動することを特徴とする光学系。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
Further, the twenty -first invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a trailing lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3''), further satisfies the following conditional expression (4), and the front lens group GA is It has a lens LN having a negative refractive power that satisfies the following conditional expressions (7) and (8), and the lens LN having the negative refractive power is a negative refractive power included in the front lens group GA. An optical system characterized by having the strongest negative refractive power among lenses with power.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Further, the twenty-second invention is comprised of, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3''), further satisfies the following conditional expression (4), and the front lens group GA is It has a lens LN having a negative refractive power that satisfies the following conditional expressions (7) and (8), and when a lens component LF having a negative refractive power adjacent to the aperture stop S is focused, An optical system characterized by movement.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
Further, the twenty-third invention comprises, in order from the object side, a front lens group GA having a positive refractive power, an aperture stop S, and a succeeding lens group GB, the front lens group GA having a positive refractive power. The front lens group GA has three or more lenses and one or more lenses with negative refractive power, and the front lens group GA includes one lens LPH with positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3''), further satisfies the following conditional expression (4), and the subsequent lens group GB An optical system characterized in that a lens component LF having an aspherical surface and having a negative refractive power adjacent to the aperture stop S moves during focusing.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography
D_GA: Total length of the front lens group GA on the optical axis when shooting at infinity
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
また、第１８の発明は、第１乃至第５、第９乃至第１４いずれかの発明においてさらに、前記開口絞りＳを含む、全体として正の屈折力を有するレンズ群ＧＰが、合焦の際に移動することを特徴とする光学系である。 Further, in a 18th invention, in any one of the 1st to 5th and 9th to 14th inventions , the lens group GP including the aperture diaphragm S and having a positive refractive power as a whole has a focusing power. This is an optical system that is characterized by moving when moving.
また、第１９の発明は、第１乃至第７、第９乃至第１８のいずれかの発明においてさらに、前記正の屈折力を有するレンズＬＰＨの内少なくとも１枚が、最も物体側に配置されることを特徴とする光学系である。
A nineteenth aspect of the present invention is that in any one of the first to seventh and ninth to eighteenth aspects, furthermore, at least one of the lenses LPH having positive refractive power is disposed closest to the object side. This is an optical system characterized by:
本発明によれば、レンズの硝材を適切に選択することで、色収差などの諸収差を補正しつつ小型化や軽量化を達成した光学系を提供することができる。 According to the present invention, by appropriately selecting the glass material of the lens, it is possible to provide an optical system that is compact and lightweight while correcting various aberrations such as chromatic aberration.
以下に、本発明にかかる光学系の実施例について詳細に説明する。なお、以下の実施例の説明は本発明の光学系の一例を説明したものであり、本発明はその要旨を逸脱しない範囲において本実施例に限定されるものではない。 Examples of the optical system according to the present invention will be described in detail below. It should be noted that the following description of the embodiment is an explanation of an example of the optical system of the present invention, and the present invention is not limited to the present embodiment within the scope of the invention.
本発明の光学系は、図１、図６、図１１、図１６、図２１、図２６、図３１、図３６に示すレンズ構成図からわかるように、物体側より順に、正の屈折力を有する前側レンズ群ＧＡと、開口絞りＳと、後続レンズ群ＧＢより構成される。 As can be seen from the lens configuration diagrams shown in FIGS. 1, 6, 11, 16, 21, 26, 31, and 36, the optical system of the present invention applies positive refractive power in order from the object side. It is composed of a front lens group GA, an aperture stop S, and a trailing lens group GB.
本発明は色収差などの諸収差を補正しつつ小型化や軽量化を達成した光学系の提供を目的としており、前側レンズ群ＧＡを構成するレンズの硝材を適切に選択することが重要となる。 The present invention aims to provide an optical system that is compact and lightweight while correcting various aberrations such as chromatic aberration, and it is important to appropriately select the glass material of the lenses constituting the front lens group GA.
特に望遠系の光学系においては、軸上色収差や倍率色収差を補正するための手段として、絞りより物体側に屈折率の波長分散が小さく、かつg線付近の短波長側の異常分散性が大きい硝材を、正の屈折力を有するレンズに当てはめることが多い。しかしこういった異常分散性を有する低分散ガラスは屈折率が低いため、それのみでは球面収差や非点収差を補正することが困難であった。 Particularly in telephoto optical systems, as a means of correcting axial chromatic aberration and lateral chromatic aberration, wavelength dispersion of the refractive index is small on the object side from the aperture, and anomalous dispersion is large on the short wavelength side near the G-line. Glass materials are often applied to lenses with positive refractive power. However, since such a low-dispersion glass having anomalous dispersion has a low refractive index, it has been difficult to correct spherical aberration and astigmatism using it alone.
そこで、前側レンズ群ＧＡ内の正の屈折力を有するレンズＬＰＨに高屈折率高分散かつg線付近の短波長側の異常分散性が大きい硝材を当てはめることで、色収差を抑えながら球面収差や非点収差も抑制し、加えて小型化や軽量化も達成することが可能になる。 Therefore, by applying a glass material with a high refractive index, high dispersion, and large anomalous dispersion on the short wavelength side near the G-line to the lens LPH with positive refractive power in the front lens group GA, chromatic aberration can be suppressed while spherical aberration and aberrations can be reduced. Point aberration can also be suppressed, and it is also possible to achieve smaller size and lighter weight.
さらに本発明の光学系は、以下の条件式を満足することを特徴とする。
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
Further, the optical system of the present invention is characterized in that it satisfies the following conditional expression.
(1) 1.85 < ND_LPH
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power
条件式（１）は、正の屈折力を有するレンズＬＰＨのｄ線における屈折率について好ましい範囲を規定するものである。この条件式を満たすことで、小型化や軽量化と高結像性能が可能となる。 Conditional expression (1) defines a preferable range for the refractive index at the d-line of the lens LPH having positive refractive power. By satisfying this conditional expression, it becomes possible to reduce the size and weight and achieve high imaging performance.
条件式（１）の下限値を超え、正の屈折力を有するレンズＬＰＨのｄ線における屈折率が小さくなると、前側レンズ群ＧＡ内で光束を収束させる効果と球面収差や非点収差を補正する効果を両立させることができないため、小型化と高結像性能を達成することが困難になる。 When the lower limit of conditional expression (1) is exceeded and the refractive index at the d-line of the lens LPH having positive refractive power becomes small, the effect of converging the light beam within the front lens group GA and correcting spherical aberration and astigmatism are achieved. Since these effects cannot be achieved simultaneously, it becomes difficult to achieve both miniaturization and high imaging performance.
また、条件式（１）の下限値を１．８８にすることで、本発明の効果を確実に達成することができる。さらに、条件式（１）の下限値を１．９１にすることで、本発明の効果をより確実に達成することができる。 Further, by setting the lower limit of conditional expression (1) to 1.88, the effects of the present invention can be reliably achieved. Furthermore, by setting the lower limit of conditional expression (1) to 1.91, the effects of the present invention can be achieved more reliably.
さらに本発明の光学系は、さらに以下の条件式を満足することを特徴とする。
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
Furthermore, the optical system of the present invention is characterized in that it further satisfies the following conditional expression.
(2) 29.0 > VD_LPH
VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power
条件式（２）は正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数について好ましい範囲を規定するものである。この条件式を満たすことで、軽量化と高結像性能が可能となる。 Conditional expression (2) defines a preferable range for the Abbe number at the d-line of the lens LPH having positive refractive power. By satisfying this conditional expression, weight reduction and high imaging performance are possible.
条件式（２）の上限値を超え、正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数が大きくなると、正の屈折力を有するレンズＬＰＨに条件式（１）を満足する高屈折率を有しながら軽量かつg線付近の短波長側の異常分散性が大きい硝材を選択できないため、軽量化と高結像性能を達成することが困難になる。 When the upper limit of conditional expression (2) is exceeded and the Abbe number at the d-line of the lens LPH with positive refractive power increases, the lens LPH with positive refractive power must be given a high refractive index that satisfies conditional expression (1). However, it is not possible to select a glass material that is lightweight and has high anomalous dispersion on the short wavelength side near the G-line, making it difficult to achieve weight reduction and high imaging performance.
また、条件式（２）の上限値を２７．５にすることで、本発明の効果を確実に達成することができる。さらに、条件式（２）の上限値を２６．０にすることで、本発明の効果をより確実に達成することができる。 Further, by setting the upper limit of conditional expression (2) to 27.5, the effects of the present invention can be reliably achieved. Furthermore, by setting the upper limit of conditional expression (2) to 26.0, the effects of the present invention can be achieved more reliably.
さらに本発明の光学系は、以下の条件式を満足することを特徴とする。
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
Further, the optical system of the present invention is characterized in that it satisfies the following conditional expression.
(3) 0.35 > LD_LPH1/D_GA
LD_LPH1: Distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power during infinity photography: Total length of the front lens group GA on the optical axis when shooting at infinity
条件式（３）は、正の屈折力を有するレンズＬＰＨの前側レンズ群ＧＡ内の位置について好ましい範囲を規定するものである。この条件式を満たすことで、小型化が可能となる。 Conditional expression (3) defines a preferable range for the position of the lens LPH having positive refractive power within the front lens group GA. By satisfying this conditional expression, miniaturization becomes possible.
条件式（３）の上限値を超え、前側レンズ群ＧＡの最も物体側の面から、正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離が長くなると、正の屈折力を有するレンズＬＰＨに光束を収束させる効果が与えにくくなるため、小型化が困難になる。 Exceeding the upper limit of conditional expression (3), the distance on the optical axis from the surface closest to the object of the front lens group GA to the surface closest to the object of one of the lenses LPH having positive refractive power If the lens LPH becomes long, it becomes difficult to give the lens LPH having a positive refractive power the effect of converging a light beam, making it difficult to miniaturize the lens LPH.
また、条件式（３）の上限値を０．３０にすることで、本発明の効果を確実に達成することができる。さらに、条件式（３）の上限値を０．２５にすることで、本発明の効果をより確実に達成することができる。 Further, by setting the upper limit of conditional expression (3) to 0.30, the effects of the present invention can be reliably achieved. Furthermore, by setting the upper limit of conditional expression (3) to 0.25, the effects of the present invention can be achieved more reliably.
さらに本発明の光学系は、以下の条件式を満足することを特徴とする。
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
Further, the optical system of the present invention is characterized in that it satisfies the following conditional expression.
(4) 60.0 < VD_LPL
VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
条件式（４）は、前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数について好ましい範囲を規定するものである。この条件式を満たすことで、良好な収差補正となる。 Conditional expression (4) defines a preferable range for the Abbe number at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA. Satisfying this conditional expression results in good aberration correction.
条件式（４）の下限値を超え、前前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数が小さくなると、十分g線付近の短波長側の異常分散性が大きい硝材を選択できないため、軸上色収差を補正することが困難になる。 If the lower limit of conditional expression (4) is exceeded, and the Abbe number at the d-line of the lenses having positive refractive power constituting the front lens group GA other than the lens LPH having positive refractive power becomes small. Since it is not possible to select a glass material that has a sufficiently large anomalous dispersion on the short wavelength side near the G-line, it becomes difficult to correct longitudinal chromatic aberration.
また、条件式（４）の下限値を６５．０にすることで、本発明の効果を確実に達成することができる。さらに、条件式（４）の下限値を７０．０にすることで、本発明の効果をより確実に達成することができる。 Furthermore, by setting the lower limit of conditional expression (4) to 65.0, the effects of the present invention can be reliably achieved. Furthermore, by setting the lower limit of conditional expression (4) to 70.0, the effects of the present invention can be achieved more reliably.
本発明の光学系は、最も物体側のレンズは合焦の際像面に対し固定されていることが望ましい。 In the optical system of the present invention, it is desirable that the lens closest to the object side be fixed to the image plane during focusing.
最も物体側のレンズを合焦の際像面に対し固定とすることで、合焦の際移動するレンズについて最大光線高が比較的低くなるもの、即ち比較的軽量なものを選ぶことが可能になる。 By fixing the lens closest to the object to the image plane during focusing, it is possible to select a lens that moves during focusing that has a relatively low maximum ray height, which is relatively lightweight. Become.
また本発明の光学系は、以下の条件式を満足することが望ましい。
（５）０．２０ ＜ ｆ／ｆＡ ＜ ２．５０
（６）－１．００ ＜ ｆ／ｆＢ ＜ ２．００
ｆ：無限遠撮影時のレンズ全系の焦点距離
ｆＡ：無限遠撮影時の前記前側レンズ群ＧＡの焦点距離
ｆＢ：無限遠撮影時の前記後続レンズ群ＧＢの焦点距離
Further, it is desirable that the optical system of the present invention satisfies the following conditional expression.
(5) 0.20 < f/fA < 2.50
(6) -1.00 < f/fB < 2.00
f: Focal length of the entire lens system when shooting at infinity fA: Focal length of the front lens group GA when shooting at infinity fB: Focal length of the subsequent lens group GB when shooting at infinity
条件式（５）は前記前側レンズ群ＧＡの屈折力について好ましい範囲を規定するものである。この条件式を満たすことで、各種収差の抑制と小型化が可能となる。 Conditional expression (5) defines a preferable range for the refractive power of the front lens group GA. By satisfying this conditional expression, various aberrations can be suppressed and miniaturization can be achieved.
条件式（６）は前記後続レンズ群ＧＢの屈折力について好ましい範囲を規定するものである。この条件式を満たすことで、小型化が可能となる。 Conditional expression (6) defines a preferable range for the refractive power of the subsequent lens group GB. By satisfying this conditional expression, miniaturization becomes possible.
条件式（５）の上限値を超え、前側レンズ群ＧＡの屈折力が強くなると、群内で球面収差や非点収差を抑制することが困難になる。 When the upper limit of conditional expression (5) is exceeded and the refractive power of the front lens group GA becomes strong, it becomes difficult to suppress spherical aberration and astigmatism within the group.
条件式（５）の下限値を超え、前側レンズ群ＧＡの屈折力が弱くなると、光束を収束する作用が弱くなるため、開口絞りを通過する光束の径が拡大し、小型化が困難になる。 If the lower limit of conditional expression (5) is exceeded and the refractive power of the front lens group GA becomes weaker, the effect of converging the light flux becomes weaker, and the diameter of the light flux passing through the aperture diaphragm increases, making it difficult to downsize. .
また、条件式（５）の下限値を０．４０にすることで、本発明の効果をより確実に達成することができる。また、条件式（５）の上限値を２．００にすることで、本発明の効果をより確実に達成することができる。 Furthermore, by setting the lower limit of conditional expression (5) to 0.40, the effects of the present invention can be achieved more reliably. Further, by setting the upper limit of conditional expression (5) to 2.00, the effects of the present invention can be achieved more reliably.
条件式（６）の上限値を超え、後続レンズ群ＧＢの正の屈折力が強くなると、前記前側レンズ群ＧＡの正の屈折力が弱くなるため、光学系の全長が拡大し、小型化が困難になる。 When the upper limit of conditional expression (6) is exceeded and the positive refractive power of the succeeding lens group GB becomes stronger, the positive refractive power of the front lens group GA becomes weaker, so the total length of the optical system increases and miniaturization becomes difficult. It becomes difficult.
条件式（６）の下限値を超え、後続レンズ群ＧＢの負の屈折力が強くなると、十分なバックフォーカスを確保しつつ絞り径を抑制することが困難になる。 If the lower limit of conditional expression (6) is exceeded and the negative refractive power of the subsequent lens group GB becomes strong, it becomes difficult to suppress the aperture diameter while ensuring sufficient back focus.
また、条件式（６）の下限値を－０．５０にすることで、本発明の効果をより確実に達成することができる。また、条件式（６）の上限値を１．５０にすることで、本発明の効果をより確実に達成することができる。 Further, by setting the lower limit of conditional expression (6) to -0.50, the effects of the present invention can be achieved more reliably. Further, by setting the upper limit of conditional expression (6) to 1.50, the effects of the present invention can be achieved more reliably.
また本発明の光学系は、前側レンズ群ＧＡが以下の条件式（７）を満足する負の屈折力を有するレンズＬＮを有することが望ましい。
（７）ＶＤ＿ＬＮ ＜ ３０．０
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
Further, in the optical system of the present invention, it is desirable that the front lens group GA includes a lens LN having a negative refractive power that satisfies the following conditional expression (7).
(7) VD_LN < 30.0
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
条件式（７）は前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数について好ましい範囲を規定するものである。この条件式を満たすことで、良好な収差補正となる。 Conditional expression (7) defines a preferable range for the Abbe number at the d-line of the lens LN having negative refractive power. Satisfying this conditional expression results in good aberration correction.
条件式（７）の上限値を超え、負の屈折力を有するレンズＬＮのｄ線におけるアッベ数が高くなると、Ｃ線とＦ線の間の軸上色収差を抑制しつつ正の屈折力を有するレンズＬＰＨに条件式（２）を満足させることが困難になる。 When the upper limit of conditional expression (7) is exceeded and the Abbe number at the d-line of the lens LN having a negative refractive power becomes high, the lens LN has a positive refractive power while suppressing longitudinal chromatic aberration between the C-line and the F-line. It becomes difficult for the lens LPH to satisfy conditional expression (2).
また、条件式（７）の上限値を２８．０にすることで、本発明の効果をより確実に達成することができる。さらに、条件式（７）の上限値を２６．０にすることで、本発明の効果をより確実に達成することができる。 Furthermore, by setting the upper limit of conditional expression (7) to 28.0, the effects of the present invention can be achieved more reliably. Furthermore, by setting the upper limit of conditional expression (7) to 26.0, the effects of the present invention can be achieved more reliably.
また本発明の光学系は、負の屈折力を有するレンズＬＮは以下の条件式（８）を満足することが望ましい。
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜ ０．０１０
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
Further, in the optical system of the present invention, it is desirable that the lens LN having negative refractive power satisfies the following conditional expression (8).
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) < 0.010
ΘgF_LN: Partial dispersion ratio for the g-line of the lens LN having the negative refractive power VD_LN: Abbe number at the d-line of the lens LN having the negative refractive power
条件式（８）は、負の屈折力を有するレンズＬＮのｇ線の異常分散性について好ましい範囲を規定するものである。この条件式を満たすことで、良好な収差補正となる。 Conditional expression (8) defines a preferable range for the g-line anomalous dispersion of the lens LN having negative refractive power. Satisfying this conditional expression results in good aberration correction.
条件式（８）の上限値を超え、負の屈折力を有するレンズＬＮのｇ線の異常分散性が高くなると、軸上色収差を抑制することが困難になる。 When the upper limit of conditional expression (8) is exceeded and the g-line anomalous dispersion of the lens LN having negative refractive power becomes high, it becomes difficult to suppress longitudinal chromatic aberration.
また、条件式（８）の上限値を０．００９にすることで、本発明の効果をより確実に達成することができる。 Furthermore, by setting the upper limit of conditional expression (8) to 0.009, the effects of the present invention can be achieved more reliably.
また本発明の光学系は、負の屈折力を有するレンズＬＮが、前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で、最も強い負の屈折力を有することが望ましい。 Further, in the optical system of the present invention, it is desirable that the lens LN having negative refractive power has the strongest negative refractive power among the lenses having negative refractive power included in the front lens group GA.
条件式（７）及び条件式（８）を満足するような負の屈折力を有するレンズＬＮの屈折力を、前側レンズ群ＧＡに含まれる負の屈折力を有するレンズの中で最も強くすることで、負の屈折力を有するレンズＬＮによる軸上色収差を補正する効果を効果的に発揮することができる。 The refractive power of the lens LN having a negative refractive power that satisfies conditional expressions (7) and (8) is made the strongest among the lenses having negative refractive power included in the front lens group GA. Therefore, the effect of correcting the longitudinal chromatic aberration due to the lens LN having negative refractive power can be effectively exhibited.
また本発明の光学系は、さらに、後続レンズ群ＧＢが、接合面が物体側に凸面を向けており、かつ物体側の媒質の屈折率が像面側の媒質の屈折率より低いような接合レンズを１組以上有することが望ましい。 Further, in the optical system of the present invention, the subsequent lens group GB has a cemented surface having a convex surface facing the object side, and in which the refractive index of the medium on the object side is lower than the refractive index of the medium on the image side. It is desirable to have one or more pairs of lenses.
後続レンズ群ＧＢが、物体側の媒質の屈折率が像面側の媒質の屈折率より低いような接合レンズをそれぞれ１組以上有することで、コマ収差を抑制することができる。 Comatic aberration can be suppressed by each of the subsequent lens groups GB having one or more cemented lenses in which the refractive index of the medium on the object side is lower than the refractive index of the medium on the image plane side.
また本発明の光学系は、後続レンズ群ＧＢが非球面を有することが望ましい。 Further, in the optical system of the present invention, it is desirable that the subsequent lens group GB has an aspherical surface.
後続レンズ群ＧＢが非球面を有することで、コマ収差や非点収差を抑制することができる。 Since the subsequent lens group GB has an aspherical surface, coma aberration and astigmatism can be suppressed.
また、数値実施例１及び数値実施例４乃至８は、さらに、開口絞りＳに隣接した負の屈折力を有するレンズ成分ＬＦが、合焦の際に移動する。 Furthermore, in Numerical Example 1 and Numerical Examples 4 to 8, the lens component LF having negative refractive power adjacent to the aperture stop S moves during focusing.
このような構成とすることで、合焦の際の非点収差などの諸収差の変化や、移動するレンズの重量を抑制することが容易となる。 With such a configuration, it becomes easy to suppress changes in various aberrations such as astigmatism during focusing and to suppress the weight of the moving lens.
また、数値実施例４及び数値実施例６は、さらに、合焦の際に、レンズ成分ＬＦの像面側に配置された正の屈折力を有するレンズ成分ＬＦＰが、レンズ成分ＬＦと別の軌跡に沿って移動する。 Furthermore, in Numerical Example 4 and Numerical Example 6, during focusing, the lens component LFP having a positive refractive power disposed on the image plane side of the lens component LF has a trajectory different from that of the lens component LF. move along.
このような構成とすることで、合焦の際の倍率色収差などの諸収差の変化を抑制することが容易になる他、フォーカスレンズ群を光軸に沿う方向へ微少に振動（ウオブリング）させる際、正の屈折力を有するレンズ成分ＬＦＰをウオブリングに用いることで、像倍率の変動を抑えることが容易となる。 With this configuration, it is easy to suppress changes in various aberrations such as lateral chromatic aberration during focusing, and it is also possible to suppress changes in various aberrations such as chromatic aberration of magnification during focusing. By using the lens component LFP having positive refractive power for wobbling, it becomes easy to suppress fluctuations in image magnification.
この他、数値実施例２は、さらに、開口絞りＳに隣接した正の屈折力を有するレンズ群ＧＦが、合焦の際に移動する。 In addition, in Numerical Example 2, the lens group GF having positive refractive power adjacent to the aperture stop S moves during focusing.
このような構成とすることで、合焦の際のコマ収差などの諸収差の変化や、像倍率の変動を抑えることが容易となる。 With such a configuration, it becomes easy to suppress changes in various aberrations such as coma aberration and fluctuations in image magnification during focusing.
この他、数値実施例３は、開口絞りＳを含む、全体として正の屈折力を有するレンズ群ＧＰが、合焦の際に移動する。 In addition, in Numerical Example 3, the lens group GP, which includes the aperture stop S and has positive refractive power as a whole, moves during focusing.
このような構成とすることで、合焦の際の非点収差などの諸収差の変化を抑えることが容易となる。 With such a configuration, it becomes easy to suppress changes in various aberrations such as astigmatism during focusing.
また、数値実施例１乃至６及び数値実施例８は、さらに、正の屈折力を有するレンズＬＰＨの内少なくとも１枚が、最も物体側に配置される。 Furthermore, in Numerical Examples 1 to 6 and Numerical Example 8, at least one of the lenses LPH having positive refractive power is arranged closest to the object side.
このような構成とすることで、光学系の最前面に摩耗度が低いガラスを配置する形になり、レンズの耐久性や耐環境性を高めることができる。 With this configuration, glass with a low degree of abrasion is placed at the forefront of the optical system, and the durability and environmental resistance of the lens can be improved.
次に、本発明の光学系に係る実施例のレンズ構成について説明する。なお、以下の説明ではレンズ構成を物体側から像面側の順番で記載する。また、実施例中のＬｎの表記は、物体側からｎ番目のレンズのことを示している。 Next, a lens configuration of an embodiment of the optical system of the present invention will be described. In the following description, the lens configuration will be described in order from the object side to the image plane side. Furthermore, the notation Ln in the examples indicates the n-th lens from the object side.
［面データ］において、面番号は物体側から数えたレンズ面または開口絞りＳの番号、ｒは各レンズ面の曲率半径、ｄは各レンズ面の間隔、ｎｄはｄ線（波長５８７．５６ｎｍ）に対する屈折率、ｖｄはｄ線に対するアッベ数、ΘｇＦはｇ線（波長４３５．８４ｎｍ）とＦ線（波長４８６．１３ｎｍ）の部分分散比を示している。 In [surface data], the surface number is the number of the lens surface or aperture stop S counted from the object side, r is the radius of curvature of each lens surface, d is the distance between each lens surface, and nd is the d-line (wavelength 587.56 nm) vd is the Abbe number for the d-line, and ΘgF is the partial dispersion ratio between the g-line (wavelength 435.84 nm) and the F-line (wavelength 486.13 nm).
面番号に付した＊（アスタリスク）は、そのレンズ面形状が非球面であることを示している。 The * (asterisk) attached to the surface number indicates that the lens surface shape is aspheric.
面番号に付した（絞り）は、その位置に開口絞りＳが位置していることを示している。平面又は開口絞りＳに対する曲率半径には∞（無限大）を記入している。 (Aperture) attached to the surface number indicates that the aperture stop S is located at that position. The radius of curvature for the plane or aperture stop S is marked ∞ (infinity).
［非球面データ］には、［面データ］において＊を付したレンズ面の非球面形状を与える各係数の値を示している。非球面の形状は、下記の式で表される。以下の式において、光軸に直交する方向への光軸からの変位をｙ、非球面と光軸の交点から光軸方向への変位（サグ量）をｚ、基準球面の曲率半径をｒ、コーニック係数をＫで表している。また、４、６、８、１０、１２、１４次の非球面係数をそれぞれＡ４、Ａ６、Ａ８、Ａ１０、Ａ１２、Ａ１４で表している。 [Aspheric data] shows the value of each coefficient that gives the aspheric shape of the lens surface marked with * in [Surface data]. The shape of the aspherical surface is expressed by the following formula. In the following formula, y is the displacement from the optical axis in the direction perpendicular to the optical axis, z is the displacement (sag amount) in the optical axis direction from the intersection of the aspherical surface and the optical axis, and r is the radius of curvature of the reference spherical surface. The conic coefficient is expressed as K. Further, the 4th, 6th, 8th, 10th, 12th, and 14th order aspherical coefficients are represented by A4, A6, A8, A10, A12, and A14, respectively.
［各種データ］には、各撮影距離合焦状態における焦点距離等の値を示している。 [Various data] shows values such as focal length in each shooting distance and focused state.
［可変間隔データ］には、各撮影距離合焦状態における可変間隔およびＢＦの値を示している。 [Variable interval data] shows the variable interval and BF values in each shooting distance focusing state.
［レンズ群データ］には、各レンズ群を構成する最も物体側の面番号および群全体の合成焦点距離を示している。 [Lens group data] shows the surface number closest to the object that constitutes each lens group and the composite focal length of the entire group.
また、各実施例に対応する収差図において、ｄ、ｇ、Ｃはそれぞれｄ線、ｇ線、Ｃ線を表しており、△Ｓ、△Ｍはそれぞれサジタル像面、メリジオナル像面を表している。 In addition, in the aberration diagrams corresponding to each example, d, g, and C represent the d-line, g-line, and C-line, respectively, and △S and △M represent the sagittal image plane and meridional image plane, respectively. .
なお、以下の全ての諸元の値において、記載している焦点距離ｆ、曲率半径ｒ、レンズ面間隔ｄ、その他の長さの単位は特記のない限りミリメートル（ｍｍ）を使用するが、光学系では比例拡大と比例縮小とにおいても同等の光学性能が得られるので、これに限られるものではない。 In addition, in the values of all the following specifications, the focal length f, radius of curvature r, lens surface spacing d, and other lengths are expressed in millimeters (mm) unless otherwise specified. The system is not limited to this, since equivalent optical performance can be obtained in proportional enlargement and proportional reduction.
さらに、図１、図６、図１１、図１６、図２１、図２６、図３１及び図３６に示すレンズ構成図において、Ｉは像面、中心を通る一点鎖線は光軸である。 Furthermore, in the lens configuration diagrams shown in FIGS. 1, 6, 11, 16, 21, 26, 31, and 36, I is the image plane, and the dashed line passing through the center is the optical axis.
図１は、本発明の実施例１の光学系のレンズ構成図である。 FIG. 1 is a lens configuration diagram of an optical system according to Example 1 of the present invention.
実施例１は物体側から順に、正の屈折力の第１レンズ群Ｇ１、負の屈折力の第２レンズ群Ｇ２、及び正の屈折力の第３レンズ群Ｇ３から構成される。第１レンズ群Ｇ１は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ成分ＬＦに、第２レンズ群Ｇ２と第３レンズ群Ｇ３の合成レンズ群は後続レンズ群ＧＢに、それぞれ相当する。第１レンズ群Ｇ１と第２レンズ群Ｇ２の間には開口絞りＳが配置される。 Embodiment 1 is composed of, in order from the object side, a first lens group G1 with positive refractive power, a second lens group G2 with negative refractive power, and a third lens group G3 with positive refractive power. The first lens group G1 corresponds to the front lens group GA, the second lens group G2 corresponds to the focusing lens component LF, and the composite lens group of the second lens group G2 and third lens group G3 corresponds to the trailing lens group GB. . An aperture stop S is arranged between the first lens group G1 and the second lens group G2.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と、物体側に凸面を向けた正メニスカスレンズＬ４と物体側に凸面を向けた負メニスカスレンズＬ５とからなる接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ６とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, and a positive meniscus lens L3 with a convex surface facing the object side. It is composed of a cemented lens consisting of a positive meniscus lens L4 with a convex surface facing the object side and a negative meniscus lens L5 with a convex surface facing the object side, and a positive meniscus lens L6 with a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ７のみから構成されている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が像面側へ移動する。 The second lens group G2 is composed only of a negative meniscus lens L7 with a convex surface facing the object side. The second lens group G2 moves entirely toward the image plane when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、物体側に凸面を向けた負メニスカスレンズＬ８と物体側に凸面を向けた正メニスカスレンズＬ９とからなる接合レンズと、両凹レンズＬ１０と両凸レンズＬ１１からなる接合レンズと、両凸レンズＬ１２と、両凹レンズＬ１３と両凸レンズＬ１４からなる接合レンズと、両凹レンズＬ１５とから構成されており、両凹レンズＬ１５の両側のレンズ面は所定の非球面形状となっている。 The third lens group G3 includes a cemented lens consisting of a negative meniscus lens L8 with a convex surface facing the object side and a positive meniscus lens L9 with a convex surface facing the object side, a cemented lens consisting of a biconcave lens L10 and a biconvex lens L11, It is composed of a biconvex lens L12, a cemented lens consisting of a biconcave lens L13 and a biconvex lens L14, and a biconcave lens L15, and the lens surfaces on both sides of the biconcave lens L15 have a predetermined aspherical shape.
続いて以下に実施例１に係る広角レンズ系の諸元値を示す。
数値実施例1
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 76.0456 3.6339 1.94595 17.98
2 107.5269 0.7000
3 71.2221 5.4299 1.55032 75.50
4 136.9321 0.2500
5 42.0109 6.4504 1.55032 75.50
6 74.2493 0.6000
7 34.3834 7.0478 1.59282 68.62
8 75.0611 1.2000 1.85451 25.15 0.6103
9 25.7590 4.8037
10 42.1035 4.4695 1.59282 68.62
11 118.4579 3.3549
12(絞り) ∞ (d12)
13 240.4527 0.9000 1.59349 67.00
14 31.7329 (d14)
15 36.8904 0.9000 1.85451 25.15
16 22.7958 4.3626 1.59282 68.62
17 58.0454 3.5976
18 -46.5475 0.9500 1.85451 25.15
19 55.7591 3.9558 2.00100 29.13
20 -136.9656 0.2000
21 100.8457 4.9452 2.05090 26.94
22 -58.9854 0.2500
23 -93.4442 1.0542 1.69895 30.05
24 42.2958 6.9268 2.00100 29.13
25 -124.2948 0.1500
26* -916.5877 3.0000 1.73077 40.50
27* 54.2362 (BF)
像面 ∞
[非球面データ]
26面 27面
K 0.00000 0.00000
A4 2.10225E-07 6.83977E-06
A6 -2.78595E-08 -2.78757E-08
A8 1.49681E-10 1.40045E-10
A10 -4.65535E-13 -3.96220E-13
A12 7.39256E-16 5.96411E-16
A14 -4.45971E-19 -3.74448E-19
[各種データ]
INF 撮影距離850mm
焦点距離 82.96 80.67
Fナンバー 1.46 1.63
全画角2ω 28.12 24.22
像高Y 21.63 21.63
レンズ全長 109.35 109.35
[可変間隔データ]
INF 撮影距離850mm
d0 ∞ 740.6522
d12 2.7882 12.3908
d14 13.3900 3.7874
BF 24.0375 24.0375
[レンズ群データ]
群 始面 焦点距離
G1 1 73.30
G2 13 -61.70
G3 15 59.81
GA(INF) 1 73.30
GB(INF) 13 158.07
Next, the specification values of the wide-angle lens system according to Example 1 are shown below.
Numerical example 1
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 76.0456 3.6339 1.94595 17.98
2 107.5269 0.7000
3 71.2221 5.4299 1.55032 75.50
4 136.9321 0.2500
5 42.0109 6.4504 1.55032 75.50
6 74.2493 0.6000
7 34.3834 7.0478 1.59282 68.62
8 75.0611 1.2000 1.85451 25.15 0.6103
9 25.7590 4.8037
10 42.1035 4.4695 1.59282 68.62
11 118.4579 3.3549
12 (aperture) ∞ (d12)
13 240.4527 0.9000 1.59349 67.00
14 31.7329 (d14)
15 36.8904 0.9000 1.85451 25.15
16 22.7958 4.3626 1.59282 68.62
17 58.0454 3.5976
18 -46.5475 0.9500 1.85451 25.15
19 55.7591 3.9558 2.00100 29.13
20 -136.9656 0.2000
21 100.8457 4.9452 2.05090 26.94
22 -58.9854 0.2500
23 -93.4442 1.0542 1.69895 30.05
24 42.2958 6.9268 2.00100 29.13
25 -124.2948 0.1500
26* -916.5877 3.0000 1.73077 40.50
27* 54.2362 (BF)
Image plane ∞
[Aspheric data]
26 pages 27 pages
K 0.00000 0.00000
A4 2.10225E-07 6.83977E-06
A6 -2.78595E-08 -2.78757E-08
A8 1.49681E-10 1.40045E-10
A10 -4.65535E-13 -3.96220E-13
A12 7.39256E-16 5.96411E-16
A14 -4.45971E-19 -3.74448E-19
[Various data]
INF shooting distance 850mm
Focal length 82.96 80.67
F number 1.46 1.63
Full angle of view 2ω 28.12 24.22
Image height Y 21.63 21.63
Lens total length 109.35 109.35
[Variable interval data]
INF shooting distance 850mm
d0 ∞ 740.6522
d12 2.7882 12.3908
d14 13.3900 3.7874
BF 24.0375 24.0375
[Lens group data]
Group starting plane focal length
G1 1 73.30
G2 13 -61.70
G3 15 59.81
GA(INF) 1 73.30
GB(INF) 13 158.07
図６は、本発明の実施例２の光学系のレンズ構成図である。 FIG. 6 is a lens configuration diagram of an optical system according to Example 2 of the present invention.
実施例２は物体側から順に、正の屈折力の第１レンズ群Ｇ１、正の屈折力の第２レンズ群Ｇ２、及び正の屈折力の第３レンズ群Ｇ３から構成される。第１レンズ群Ｇ１は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ群ＧＦに、第２レンズ群Ｇ２と第３レンズ群Ｇ３の合成レンズ群は後続レンズ群ＧＢに、それぞれ相当する。第１レンズ群Ｇ１と第２レンズ群Ｇ２の間には開口絞りＳが配置される。 The second embodiment includes, in order from the object side, a first lens group G1 with positive refractive power, a second lens group G2 with positive refractive power, and a third lens group G3 with positive refractive power. The first lens group G1 corresponds to the front lens group GA, the second lens group G2 corresponds to the focusing lens group GF, and the composite lens group of the second lens group G2 and the third lens group G3 corresponds to the trailing lens group GB. . An aperture stop S is arranged between the first lens group G1 and the second lens group G2.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と物体側に凸面を向けた負メニスカスレンズＬ４とからなる接合レンズと、物体側に凸面を向けた負メニスカスレンズＬ５と、物体側に凸面を向けた正メニスカスレンズＬ６とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, a positive meniscus lens L3 with a convex surface facing the object side, and an object lens. It is composed of a cemented lens consisting of a negative meniscus lens L4 with a convex surface facing the object side, a negative meniscus lens L5 with the convex surface facing the object side, and a positive meniscus lens L6 with the convex surface facing the object side.
第２レンズ群Ｇ２は、両凹レンズＬ７と物体側に凸面を向けた正メニスカスレンズＬ８からなる接合レンズと、両凸レンズＬ９と、両凹レンズＬ１０と両凸レンズＬ１１からなる接合レンズとから構成されており、両凸レンズＬ９の両側のレンズ面は所定の非球面形状となっている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が物体側へ移動する。 The second lens group G2 is composed of a cemented lens consisting of a biconcave lens L7 and a positive meniscus lens L8 with a convex surface facing the object side, a biconvex lens L9, and a cemented lens consisting of a biconcave lens L10 and a biconvex lens L11. The lens surfaces on both sides of the biconvex lens L9 have a predetermined aspherical shape. The entire second lens group G2 moves toward the object side when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、両凸レンズＬ１２と両凹レンズＬ１３からなる接合レンズと、像面側に凸面を向けた負メニスカスレンズＬ１４とから構成されている。 The third lens group G3 is composed of a cemented lens consisting of a biconvex lens L12 and a biconcave lens L13, and a negative meniscus lens L14 with a convex surface facing the image plane side.
続いて以下に実施例２に係る光学系の諸元値を示す。
数値実施例2
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 59.0805 7.1452 2.00069 25.46
2 124.0974 0.1500
3 62.2250 5.4822 1.55032 75.50
4 115.1151 0.1500
5 46.9110 7.2461 1.59282 68.62
6 187.6476 1.8000 1.85451 25.15 0.6103
7 46.7240 2.4389
8 76.9359 1.8000 1.85451 25.15
9 34.2953 1.2411
10 39.6998 4.0067 1.43700 95.10
11 65.8369 5.3532
12(絞り) ∞ (d12)
13 -47.1205 1.0000 1.59270 35.45
14 35.7377 5.0313 2.00100 29.13
15 152.9378 0.2663
16* 104.7367 5.9682 1.80610 40.73
17* -69.9629 0.2725
18 -75.7219 2.0000 1.67300 38.26
19 34.6501 10.7501 1.59282 68.62
20 -46.8610 (d20)
21 156.7256 10.0871 2.00100 29.13
22 -56.4150 1.0000 1.59270 35.45
23 79.9698 4.1429
24 -51.4977 1.0000 1.61340 44.27
25 -200.0000 (BF)
像面 ∞
[非球面データ]
16面 17面
K 0.00000 0.00000
A4 -2.57618E-06 2.34062E-06
A6 -7.07508E-10 -9.77334E-10
A8 4.44604E-12 6.71838E-12
A10 -4.26493E-15 -9.05311E-15
A12 0.00000E+00 0.00000E+00
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 84.98 76.41
Fナンバー 1.46 1.71
全画角2ω 28.34 27.02
像高Y 21.63 21.63
レンズ全 121.00 121.00
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 679.0000
d12 19.1812 5.8617
d20 2.0000 15.3196
BF 21.4868 21.4868
[レンズ群データ]
群 始面 焦点距離
G1 1 167.11
G2 13 75.96
G3 21 -508.91
GA(INF) 1 167.11
GB(INF) 13 80.44
Next, the specification values of the optical system according to Example 2 are shown below.
Numerical example 2
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 59.0805 7.1452 2.00069 25.46
2 124.0974 0.1500
3 62.2250 5.4822 1.55032 75.50
4 115.1151 0.1500
5 46.9110 7.2461 1.59282 68.62
6 187.6476 1.8000 1.85451 25.15 0.6103
7 46.7240 2.4389
8 76.9359 1.8000 1.85451 25.15
9 34.2953 1.2411
10 39.6998 4.0067 1.43700 95.10
11 65.8369 5.3532
12 (aperture) ∞ (d12)
13 -47.1205 1.0000 1.59270 35.45
14 35.7377 5.0313 2.00100 29.13
15 152.9378 0.2663
16* 104.7367 5.9682 1.80610 40.73
17* -69.9629 0.2725
18 -75.7219 2.0000 1.67300 38.26
19 34.6501 10.7501 1.59282 68.62
20 -46.8610 (d20)
21 156.7256 10.0871 2.00100 29.13
22 -56.4150 1.0000 1.59270 35.45
23 79.9698 4.1429
24 -51.4977 1.0000 1.61340 44.27
25 -200.0000 (BF)
Image plane ∞
[Aspheric data]
16 pages 17 pages
K 0.00000 0.00000
A4 -2.57618E-06 2.34062E-06
A6 -7.07508E-10 -9.77334E-10
A8 4.44604E-12 6.71838E-12
A10 -4.26493E-15 -9.05311E-15
A12 0.00000E+00 0.00000E+00
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 84.98 76.41
F number 1.46 1.71
Full angle of view 2ω 28.34 27.02
Image height Y 21.63 21.63
All lenses 121.00 121.00
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 679.0000
d12 19.1812 5.8617
d20 2.0000 15.3196
BF 21.4868 21.4868
[Lens group data]
Group starting plane focal length
G1 1 167.11
G2 13 75.96
G3 21 -508.91
GA(INF) 1 167.11
GB(INF) 13 80.44
図１１は、本発明の実施例３の光学系のレンズ構成図である。 FIG. 11 is a lens configuration diagram of an optical system according to Example 3 of the present invention.
実施例３は物体側から順に、正の屈折力の第１レンズ群Ｇ１、正の屈折力の第２レンズ群Ｇ２、及び正の屈折力の第３レンズ群Ｇ３から構成される。第２レンズ群Ｇ２は合焦レンズ群ＧＰに相当する。 The third embodiment includes, in order from the object side, a first lens group G1 with positive refractive power, a second lens group G2 with positive refractive power, and a third lens group G3 with positive refractive power. The second lens group G2 corresponds to the focusing lens group GP.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、両凸レンズＬ２と両凹レンズＬ３からなる接合レンズとから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, and a cemented lens consisting of a biconvex lens L2 and a biconcave lens L3.
第２レンズ群Ｇ２は、物体側に凸面を向けた正メニスカスレンズＬ４と、物体側に凸面を向けた正メニスカスレンズＬ５と物体側に凸面を向けた負メニスカスレンズＬ６とからなる接合レンズと、両凹レンズＬ７と両凸レンズＬ８からなる接合レンズと、両凹レンズＬ９と両凸レンズＬ１０からなる接合レンズと、両凸レンズＬ１１とから構成されており、両凸レンズＬ１１の両側のレンズ面は所定の非球面形状となっている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が物体側へ移動する。物体側に凸面を向けた負メニスカスレンズＬ６と両凹レンズＬ７の間には開口絞りが配置される。 The second lens group G2 is a cemented lens consisting of a positive meniscus lens L4 with a convex surface facing the object side, a positive meniscus lens L5 with a convex surface facing the object side, and a negative meniscus lens L6 with a convex surface facing the object side, It is composed of a cemented lens consisting of a biconcave lens L7 and a biconvex lens L8, a cemented lens consisting of a biconcave lens L9 and a biconvex lens L10, and a biconvex lens L11, and the lens surfaces on both sides of the biconvex lens L11 have a predetermined aspherical shape. It becomes. The entire second lens group G2 moves toward the object side when focusing from an infinite object distance to a short distance. An aperture stop is arranged between the negative meniscus lens L6, which has a convex surface facing the object side, and the biconcave lens L7.
第３レンズ群Ｇ３は、両凸レンズＬ１２と両凹レンズＬ１３からなる接合レンズと、像面側に凸面を向けた負メニスカスレンズＬ１４とから構成されている。 The third lens group G3 is composed of a cemented lens consisting of a biconvex lens L12 and a biconcave lens L13, and a negative meniscus lens L14 with a convex surface facing the image plane side.
物体側に凸面を向けた正メニスカスレンズＬ１から物体側に凸面を向けた負メニスカスレンズＬ６は請求項１における前側レンズ群ＧＡに、両凹レンズＬ７から像面側に凸面を向けた負メニスカスレンズＬ１４は請求項１における後続レンズ群ＧＢに、それぞれ相当する。 A positive meniscus lens L1 with a convex surface facing the object side and a negative meniscus lens L6 with a convex surface facing the object side are included in the front lens group GA in claim 1, and a negative meniscus lens L14 with a convex surface facing the image plane side from the biconcave lens L7. correspond to the subsequent lens group GB in claim 1, respectively.
続いて以下に実施例３に係る光学系の諸元値を示す。
数値実施例3
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 98.7583 3.8658 2.00069 25.46
2 136.4800 0.1500
3 55.1959 11.7600 1.43700 95.10
4 -2372.1524 1.5000 1.78880 28.43
5 85.0384 (d5)
6 46.1217 7.6960 2.00069 25.46
7 163.3773 0.1500
8 30.3198 9.2437 1.49700 81.61
9 272.4112 1.0000 1.85451 25.15 0.6103
10 22.5644 12.1436
11(絞り) ∞ 3.4685
12 -66.4128 1.0000 1.67270 32.17
13 45.8068 4.5900 1.88100 40.14
14 -129.7345 0.7581
15 -77.0148 0.9000 1.67300 38.26
16 49.7552 5.9329 1.95375 32.32
17 -344.2076 3.8625
18* 348.0262 4.7142 1.77250 49.50
19* -148.3093 (d19)
20 139.9276 5.6566 1.90043 37.37
21 -58.7627 0.9000 1.67300 38.26
22 188.7532 2.8208
23 -92.1057 1.0000 1.51680 64.20
24 -329.9466 (BF)
像面 ∞
[非球面データ]
18面 19面
K 0.00000 0.00000
A4 2.55460E-07 1.75735E-06
A6 3.02622E-09 6.19140E-09
A8 -2.58876E-11 -7.47605E-11
A10 2.63923E-13 4.65330E-13
A12 -6.36950E-16 -8.67926E-16
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 84.93 85.29
Fナンバー 1.46 1.83
全画角2ω 28.31 23.37
像高Y 21.63 21.63
レンズ全 123.00 123.00
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 677.0000
d5 17.2586 2.5000
d19 2.1288 16.8874
BF 20.5000 20.5000
[レンズ群データ]
群 始面 焦点距離
G1 1 421.03
G2 6 99.97
G3 20 346.70
GA(INF) 1 130.53
GB(INF) 12 85.17
Next, the specification values of the optical system according to Example 3 are shown below.
Numerical example 3
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 98.7583 3.8658 2.00069 25.46
2 136.4800 0.1500
3 55.1959 11.7600 1.43700 95.10
4 -2372.1524 1.5000 1.78880 28.43
5 85.0384 (d5)
6 46.1217 7.6960 2.00069 25.46
7 163.3773 0.1500
8 30.3198 9.2437 1.49700 81.61
9 272.4112 1.0000 1.85451 25.15 0.6103
10 22.5644 12.1436
11(Aperture) ∞ 3.4685
12 -66.4128 1.0000 1.67270 32.17
13 45.8068 4.5900 1.88100 40.14
14 -129.7345 0.7581
15 -77.0148 0.9000 1.67300 38.26
16 49.7552 5.9329 1.95375 32.32
17 -344.2076 3.8625
18* 348.0262 4.7142 1.77250 49.50
19* -148.3093 (d19)
20 139.9276 5.6566 1.90043 37.37
21 -58.7627 0.9000 1.67300 38.26
22 188.7532 2.8208
23 -92.1057 1.0000 1.51680 64.20
24 -329.9466 (BF)
Image plane ∞
[Aspheric data]
18 pages 19 pages
K 0.00000 0.00000
A4 2.55460E-07 1.75735E-06
A6 3.02622E-09 6.19140E-09
A8 -2.58876E-11 -7.47605E-11
A10 2.63923E-13 4.65330E-13
A12 -6.36950E-16 -8.67926E-16
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 84.93 85.29
F number 1.46 1.83
Full angle of view 2ω 28.31 23.37
Image height Y 21.63 21.63
All lenses 123.00 123.00
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 677.0000
d5 17.2586 2.5000
d19 2.1288 16.8874
BF 20.5000 20.5000
[Lens group data]
Group starting plane focal length
G1 1 421.03
G2 6 99.97
G3 20 346.70
GA(INF) 1 130.53
GB(INF) 12 85.17
図１６は、本発明の実施例４の光学系のレンズ構成図である。 FIG. 16 is a lens configuration diagram of an optical system according to Example 4 of the present invention.
実施例１は物体側から順に、正の屈折力の第１レンズ群Ｇ１、負の屈折力の第２レンズ群Ｇ２、正の屈折力の第３レンズ群Ｇ３、正の屈折力の第４レンズ群Ｇ４、及び負の屈折力の第５レンズ群Ｇ５から構成される。第１レンズ群Ｇ１と第２レンズ群Ｇ２の合成レンズ群は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ成分ＬＦに、第３レンズ群Ｇ３から第５レンズ群Ｇ５までの合成レンズ群は後続レンズ群ＧＢに、それぞれ相当する。第２レンズ群Ｇ２と第３レンズ群Ｇ３の間には開口絞りＳが配置される。 In Example 1, in order from the object side, the first lens group G1 has a positive refractive power, the second lens group G2 has a negative refractive power, the third lens group G3 has a positive refractive power, and the fourth lens has a positive refractive power. It is composed of a lens group G4 and a fifth lens group G5 having negative refractive power. The composite lens group of the first lens group G1 and the second lens group G2 is the front lens group GA, the second lens group G2 is the focusing lens component LF, and the composite lens group from the third lens group G3 to the fifth lens group G5 The groups each correspond to the subsequent lens group GB. An aperture stop S is arranged between the second lens group G2 and the third lens group G3.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と物体側に凸面を向けた負メニスカスレンズＬ４とからなる接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ５とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, a positive meniscus lens L3 with a convex surface facing the object side, and an object lens. It consists of a cemented lens consisting of a negative meniscus lens L4 with a convex surface facing the side, and a positive meniscus lens L5 with a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ６のみから構成されている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が像面側へ移動する。 The second lens group G2 is composed only of a negative meniscus lens L6 with a convex surface facing the object side. The entire second lens group G2 moves toward the image plane when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、物体側に凸面を向けた負メニスカスレンズＬ７と両凸レンズＬ８とからなる接合レンズと、両凹レンズＬ９と両凸レンズＬ１０からなる接合レンズとから構成されている。 The third lens group G3 is composed of a cemented lens consisting of a negative meniscus lens L7 with a convex surface facing the object side and a biconvex lens L8, and a cemented lens consisting of a biconcave lens L9 and a biconvex lens L10.
第４レンズ群Ｇ４は、像面側に凸面を向けた正メニスカスレンズＬ１１のみから構成されている。第４レンズ群Ｇ４は、無限遠物体距離から近距離へのフォーカシングに際して全体が物体側へ移動する。 The fourth lens group G4 is composed only of a positive meniscus lens L11 with a convex surface facing the image plane side. The entire fourth lens group G4 moves toward the object side when focusing from an infinite object distance to a short distance.
第５レンズ群Ｇ５は、両凹レンズＬ１２と両凸レンズＬ１３からなる接合レンズと、両凹レンズＬ１４とから構成されており、両凹レンズＬ１４の両側のレンズ面は所定の非球面形状となっている。 The fifth lens group G5 is composed of a cemented lens consisting of a biconcave lens L12 and a biconvex lens L13, and a biconcave lens L14, and the lens surfaces on both sides of the biconcave lens L14 have a predetermined aspherical shape.
続いて以下に実施例４に係る光学系の諸元値を示す。
数値実施例4
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 60.8538 7.5645 1.92286 20.88
2 121.4722 0.1500
3 82.1832 6.0909 1.59282 68.62
4 215.9772 0.1500
5 37.9860 10.3422 1.55032 75.50
6 493.5963 1.2000 1.85478 24.80 0.6122
7 28.1290 2.0119
8 34.5270 6.9769 1.55032 75.50
9 204.5673 (d9)
10 1739.6707 0.9000 1.51680 64.20
11 32.3904 (d11)
12(絞り) ∞ 1.5032
13 99.6385 1.0000 1.78880 28.43
14 22.4131 6.4078 1.59282 68.62
15 -295.7936 2.1521
16 -41.7793 1.0000 1.61340 44.27
17 38.7780 5.3878 1.95375 32.32
18 -79.3993 (d18)
19 -6613.6939 3.6131 1.75500 52.32
20 -58.5026 (d20)
21 -110.7810 1.0000 1.59270 35.45
22 46.1772 7.6830 2.00100 29.13
23 -115.7988 0.3870
24* -295.2233 1.6000 1.73077 40.50
25* 49.1787 (BF)
像面 ∞
[非球面データ]
24面 25面
K 0.00000 0.00000
A4 -3.06317E-06 2.14075E-06
A6 -8.51812E-09 -5.98666E-09
A8 1.12461E-10 8.61876E-11
A10 -3.88152E-13 -2.31587E-13
A12 4.27094E-16 1.79042E-16
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 83.09 81.76
Fナンバー 1.46 1.58
全画角2ω 27.98 21.66
像高Y 21.63 21.63
レンズ全長 115.00 115.00
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 685.0000
d9 3.4894 12.8846
d11 15.6433 6.2482
d18 3.0773 2.0000
d20 2.0000 3.0773
BF 23.6695 23.6695
[レンズ群データ]
群 始面 焦点距離
G1 1 72.98
G2 10 -63.88
G3 13 131.20
G4 19 78.16
G5 21 -205.46
GA(INF) 1 204.12
GB(INF) 13 60.13
Next, the specification values of the optical system according to Example 4 are shown below.
Numerical example 4
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 60.8538 7.5645 1.92286 20.88
2 121.4722 0.1500
3 82.1832 6.0909 1.59282 68.62
4 215.9772 0.1500
5 37.9860 10.3422 1.55032 75.50
6 493.5963 1.2000 1.85478 24.80 0.6122
7 28.1290 2.0119
8 34.5270 6.9769 1.55032 75.50
9 204.5673 (d9)
10 1739.6707 0.9000 1.51680 64.20
11 32.3904 (d11)
12(Aperture) ∞ 1.5032
13 99.6385 1.0000 1.78880 28.43
14 22.4131 6.4078 1.59282 68.62
15 -295.7936 2.1521
16 -41.7793 1.0000 1.61340 44.27
17 38.7780 5.3878 1.95375 32.32
18 -79.3993 (d18)
19 -6613.6939 3.6131 1.75500 52.32
20 -58.5026 (d20)
21 -110.7810 1.0000 1.59270 35.45
22 46.1772 7.6830 2.00100 29.13
23 -115.7988 0.3870
24* -295.2233 1.6000 1.73077 40.50
25* 49.1787 (BF)
Image plane ∞
[Aspheric data]
24 pages 25 pages
K 0.00000 0.00000
A4 -3.06317E-06 2.14075E-06
A6 -8.51812E-09 -5.98666E-09
A8 1.12461E-10 8.61876E-11
A10 -3.88152E-13 -2.31587E-13
A12 4.27094E-16 1.79042E-16
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 83.09 81.76
F number 1.46 1.58
Full angle of view 2ω 27.98 21.66
Image height Y 21.63 21.63
Lens total length 115.00 115.00
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 685.0000
d9 3.4894 12.8846
d11 15.6433 6.2482
d18 3.0773 2.0000
d20 2.0000 3.0773
BF 23.6695 23.6695
[Lens group data]
Group starting plane focal length
G1 1 72.98
G2 10 -63.88
G3 13 131.20
G4 19 78.16
G5 21 -205.46
GA(INF) 1 204.12
GB(INF) 13 60.13
図２１は、本発明の実施例５の光学系のレンズ構成図である。 FIG. 21 is a lens configuration diagram of an optical system according to Example 5 of the present invention.
実施例５は物体側から順に、正の屈折力の第１レンズ群Ｇ１、負の屈折力の第２レンズ群Ｇ２、及び正の屈折力の第３レンズ群Ｇ３から構成される。第１レンズ群Ｇ１と第２レンズ群Ｇ２の合成レンズ群は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ成分ＬＦに、第３レンズ群Ｇ３は後続レンズ群ＧＢに、それぞれ相当する。第２レンズ群Ｇ２と第３レンズ群Ｇ３の間には開口絞りＳが配置される。 The fifth embodiment includes, in order from the object side, a first lens group G1 with positive refractive power, a second lens group G2 with negative refractive power, and a third lens group G3 with positive refractive power. The composite lens group of the first lens group G1 and the second lens group G2 corresponds to the front lens group GA, the second lens group G2 corresponds to the focusing lens component LF, and the third lens group G3 corresponds to the trailing lens group GB. . An aperture stop S is arranged between the second lens group G2 and the third lens group G3.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と物体側に凸面を向けた負メニスカスレンズＬ４とからなる接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ５とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, a positive meniscus lens L3 with a convex surface facing the object side, and an object lens. It consists of a cemented lens consisting of a negative meniscus lens L4 with a convex surface facing the side, and a positive meniscus lens L5 with a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ６のみから構成されている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が像面側へ移動する。 The second lens group G2 is composed only of a negative meniscus lens L6 with a convex surface facing the object side. The entire second lens group G2 moves toward the image plane when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、物体側に凸面を向けた負メニスカスレンズＬ７と物体側に凸面を向けた正メニスカスレンズＬ８とからなる接合レンズと、両凹レンズＬ９と両凸レンズＬ１０からなる接合レンズと、両凸レンズＬ１１と、両凹レンズＬ１２と両凸レンズＬ１３からなる接合レンズと、物体側に凸面を向けた負メニスカスレンズＬ１４とから構成されており、物体側に凸面を向けた負メニスカスレンズＬ１４の両側のレンズ面は所定の非球面形状となっている。 The third lens group G3 includes a cemented lens consisting of a negative meniscus lens L7 with a convex surface facing the object side and a positive meniscus lens L8 with a convex surface facing the object side, and a cemented lens consisting of a biconcave lens L9 and a biconvex lens L10, It is composed of a biconvex lens L11, a cemented lens consisting of a biconcave lens L12 and a biconvex lens L13, and a negative meniscus lens L14 with a convex surface facing the object side. The lens surface has a predetermined aspherical shape.
続いて以下に実施例５に係る光学系の諸元値を示す。
数値実施例5
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 71.4013 6.3423 1.92286 20.88
2 132.4420 0.1500
3 56.9778 7.1314 1.59282 68.62
4 116.4626 0.7000
5 36.1203 8.9637 1.55032 75.50
6 102.3477 1.2000 1.85478 24.80 0.6122
7 27.9548 2.5766
8 36.0064 7.0194 1.55032 75.50
9 196.9580 (d9)
10 691.0994 0.9000 1.51680 64.20
11 30.5189 (d11)
12(絞り) ∞ 1.5000
13 74.8970 1.0000 1.77047 29.74
14 21.0525 6.0077 1.59282 68.62
15 593.3836 2.9792
16 -43.6149 1.0000 1.65412 39.68
17 42.7032 4.4395 1.88100 40.14
18 -150.9781 0.1500
19 136.2655 6.2360 1.88100 40.14
20 -56.2675 0.1500
21 -101.3823 1.0000 1.56732 42.84
22 42.6440 7.3673 2.00100 29.13
23 -142.2223 0.1500
24* 200.0000 2.5000 1.73077 40.50
25* 35.8408 (BF)
像面 ∞
[非球面データ]
24面 25面
K 0.00000 0.00000
A4 -3.56928E-06 1.58308E-06
A6 5.51226E-09 4.90276E-09
A8 -1.43259E-11 -4.58873E-12
A10 4.90544E-14 4.71386E-14
A12 -6.39841E-17 -6.41270E-17
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 82.50 81.63
Fナンバー 1.46 1.54
全画角2ω 28.17 21.57
像高Y 21.63 21.63
レンズ全長 114.65 114.65
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 685.3500
d9 3.6686 12.9241
d11 16.0295 6.7739
BF 25.4891 25.4891
[レンズ群データ]
群 始面 焦点距離
G1 1 69.68
G2 10 -61.81
G3 13 61.12
GA(INF) 1 191.85
GB(INF) 13 61.12
Next, the specification values of the optical system according to Example 5 are shown below.
Numerical example 5
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 71.4013 6.3423 1.92286 20.88
2 132.4420 0.1500
3 56.9778 7.1314 1.59282 68.62
4 116.4626 0.7000
5 36.1203 8.9637 1.55032 75.50
6 102.3477 1.2000 1.85478 24.80 0.6122
7 27.9548 2.5766
8 36.0064 7.0194 1.55032 75.50
9 196.9580 (d9)
10 691.0994 0.9000 1.51680 64.20
11 30.5189 (d11)
12(Aperture) ∞ 1.5000
13 74.8970 1.0000 1.77047 29.74
14 21.0525 6.0077 1.59282 68.62
15 593.3836 2.9792
16 -43.6149 1.0000 1.65412 39.68
17 42.7032 4.4395 1.88100 40.14
18 -150.9781 0.1500
19 136.2655 6.2360 1.88100 40.14
20 -56.2675 0.1500
21 -101.3823 1.0000 1.56732 42.84
22 42.6440 7.3673 2.00100 29.13
23 -142.2223 0.1500
24* 200.0000 2.5000 1.73077 40.50
25* 35.8408 (BF)
Image plane ∞
[Aspheric data]
24 pages 25 pages
K 0.00000 0.00000
A4 -3.56928E-06 1.58308E-06
A6 5.51226E-09 4.90276E-09
A8 -1.43259E-11 -4.58873E-12
A10 4.90544E-14 4.71386E-14
A12 -6.39841E-17 -6.41270E-17
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 82.50 81.63
F number 1.46 1.54
Full angle of view 2ω 28.17 21.57
Image height Y 21.63 21.63
Lens total length 114.65 114.65
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 685.3500
d9 3.6686 12.9241
d11 16.0295 6.7739
BF 25.4891 25.4891
[Lens group data]
Group starting plane focal length
G1 1 69.68
G2 10 -61.81
G3 13 61.12
GA(INF) 1 191.85
GB(INF) 13 61.12
図２６は、本発明の実施例６の光学系のレンズ構成図である。 FIG. 26 is a lens configuration diagram of an optical system according to Example 6 of the present invention.
実施例６は物体側から順に、正の屈折力の第１レンズ群Ｇ１、負の屈折力の第２レンズ群Ｇ２、正の屈折力の第３レンズ群Ｇ３、正の屈折力の第４レンズ群Ｇ４、及び負の屈折力の第５レンズ群Ｇ５から構成される。第１レンズ群Ｇ１は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ成分ＬＦに、第２レンズ群Ｇ２から第５レンズ群Ｇ５までの合成レンズ群は後続レンズ群ＧＢに、それぞれ相当する。第１レンズ群Ｇ１と第２レンズ群Ｇ２の間には開口絞りＳが配置される。 In Example 6, in order from the object side, the first lens group G1 has a positive refractive power, the second lens group G2 has a negative refractive power, the third lens group G3 has a positive refractive power, and the fourth lens has a positive refractive power. It is composed of a lens group G4 and a fifth lens group G5 having negative refractive power. The first lens group G1 corresponds to the front lens group GA, the second lens group G2 corresponds to the focusing lens component LF, and the composite lens group from the second lens group G2 to the fifth lens group G5 corresponds to the subsequent lens group GB. do. An aperture stop S is arranged between the first lens group G1 and the second lens group G2.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と物体側に凸面を向けた負メニスカスレンズＬ４とからなる接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ５とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, a positive meniscus lens L3 with a convex surface facing the object side, and an object lens. It consists of a cemented lens consisting of a negative meniscus lens L4 with a convex surface facing the side, and a positive meniscus lens L5 with a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ６のみから構成されている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が像面側へ移動する。 The second lens group G2 is composed only of a negative meniscus lens L6 with a convex surface facing the object side. The second lens group G2 moves entirely toward the image plane when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、物体側に凸面を向けた負メニスカスレンズＬ７と両凸レンズＬ８とからなる接合レンズと、両凹レンズＬ９と両凸レンズＬ１０からなる接合レンズとから構成されている。 The third lens group G3 is composed of a cemented lens consisting of a negative meniscus lens L7 with a convex surface facing the object side and a biconvex lens L8, and a cemented lens consisting of a biconcave lens L9 and a biconvex lens L10.
第４レンズ群Ｇ４は、両凸レンズＬ１１のみから構成されている。第４レンズ群Ｇ４は、無限遠物体距離から近距離へのフォーカシングに際して全体が物体側へ移動する。 The fourth lens group G4 is composed only of the biconvex lens L11. The entire fourth lens group G4 moves toward the object side when focusing from an infinite object distance to a short distance.
第５レンズ群Ｇ５は、両凹レンズＬ１２と両凸レンズＬ１３からなる接合レンズと、物体側に凸面を向けた負メニスカスレンズＬ１４とから構成されており、物体側に凸面を向けた負メニスカスレンズＬ１４の両側のレンズ面は所定の非球面形状となっている。 The fifth lens group G5 is composed of a cemented lens consisting of a biconcave lens L12 and a biconvex lens L13, and a negative meniscus lens L14 with a convex surface facing the object side. The lens surfaces on both sides have a predetermined aspherical shape.
続いて以下に実施例６に係る光学系の諸元値を示す。
数値実施例6
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 76.3526 5.3025 1.92286 20.88
2 134.7355 0.1500
3 52.0634 7.0966 1.59282 68.62
4 109.5885 0.1500
5 32.2330 8.7508 1.55032 75.50
6 70.9997 1.2000 1.85478 24.80 0.6122
7 26.0123 3.6382
8 38.6875 5.7322 1.55032 75.50
9 128.5259 3.3392
10(絞り) ∞ (d10)
11 614.0336 0.9000 1.51680 64.20
12 31.0971 (d12)
13 62.4970 1.0000 1.85478 24.80
14 22.2510 6.3037 1.59282 68.62
15 -3638.5792 2.4787
16 -40.5101 1.0000 1.61340 44.27
17 41.1979 5.2068 2.00100 29.13
18 -82.2197 (d18)
19 380.8951 4.0906 1.75500 52.32
20 -55.2746 (d20)
21 -85.5662 1.0000 1.59270 35.45
22 52.2837 4.6380 2.00100 29.13
23 -947.6587 0.1500
24* 80.0602 1.7000 1.80610 40.73
25* 37.3443 (BF)
像面 ∞
[非球面データ]
24面 25面
K 0.00000 0.00000
A4 -7.16787E-06 -4.02894E-06
A6 1.15394E-08 1.08741E-08
A8 1.34688E-11 2.28731E-11
A10 -4.38281E-14 -4.63572E-14
A12 0.00000E+00 0.00000E+00
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 82.84 80.15
Fナンバー 1.46 1.62
全画角2ω 28.06 24.23
像高Y 21.63 21.63
レンズ全長 109.00 109.00
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 691.0000
d10 2.7782 12.7030
d12 14.0574 4.1326
d18 2.5000 2.0000
d20 2.0000 2.5000
BF 23.8371 23.8371
[レンズ群データ]
群 始面 焦点距離
G1 1 73.83
G2 11 -63.42
G3 13 114.45
G4 19 64.19
G5 21 -107.31
GA(INF) 1 73.83
GB(INF) 11 159.73
Next, the specification values of the optical system according to Example 6 are shown below.
Numerical example 6
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 76.3526 5.3025 1.92286 20.88
2 134.7355 0.1500
3 52.0634 7.0966 1.59282 68.62
4 109.5885 0.1500
5 32.2330 8.7508 1.55032 75.50
6 70.9997 1.2000 1.85478 24.80 0.6122
7 26.0123 3.6382
8 38.6875 5.7322 1.55032 75.50
9 128.5259 3.3392
10 (aperture) ∞ (d10)
11 614.0336 0.9000 1.51680 64.20
12 31.0971 (d12)
13 62.4970 1.0000 1.85478 24.80
14 22.2510 6.3037 1.59282 68.62
15 -3638.5792 2.4787
16 -40.5101 1.0000 1.61340 44.27
17 41.1979 5.2068 2.00100 29.13
18 -82.2197 (d18)
19 380.8951 4.0906 1.75500 52.32
20 -55.2746 (d20)
21 -85.5662 1.0000 1.59270 35.45
22 52.2837 4.6380 2.00100 29.13
23 -947.6587 0.1500
24* 80.0602 1.7000 1.80610 40.73
25* 37.3443 (BF)
Image plane ∞
[Aspheric data]
24 pages 25 pages
K 0.00000 0.00000
A4 -7.16787E-06 -4.02894E-06
A6 1.15394E-08 1.08741E-08
A8 1.34688E-11 2.28731E-11
A10 -4.38281E-14 -4.63572E-14
A12 0.00000E+00 0.00000E+00
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 82.84 80.15
F number 1.46 1.62
Full angle of view 2ω 28.06 24.23
Image height Y 21.63 21.63
Lens total length 109.00 109.00
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 691.0000
d10 2.7782 12.7030
d12 14.0574 4.1326
d18 2.5000 2.0000
d20 2.0000 2.5000
BF 23.8371 23.8371
[Lens group data]
Group starting plane focal length
G1 1 73.83
G2 11 -63.42
G3 13 114.45
G4 19 64.19
G5 21 -107.31
GA(INF) 1 73.83
GB(INF) 11 159.73
図３１は、本発明の実施例７の光学系のレンズ構成図である。 FIG. 31 is a lens configuration diagram of an optical system according to Example 7 of the present invention.
実施例７は物体側から順に、正の屈折力の第１レンズ群Ｇ１、負の屈折力の第２レンズ群Ｇ２、及び正の屈折力の第３レンズ群Ｇ３から構成される。第１レンズ群Ｇ１は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ成分ＬＦに、第２レンズ群Ｇ２と第３レンズ群Ｇ３の合成レンズ群は後続レンズ群ＧＢに、それぞれ相当する。第１レンズ群Ｇ１と第２レンズ群Ｇ２の間には開口絞りＳが配置される。 Embodiment 7 is composed of, in order from the object side, a first lens group G1 with positive refractive power, a second lens group G2 with negative refractive power, and a third lens group G3 with positive refractive power. The first lens group G1 corresponds to the front lens group GA, the second lens group G2 corresponds to the focusing lens component LF, and the composite lens group of the second lens group G2 and third lens group G3 corresponds to the trailing lens group GB. . An aperture stop S is arranged between the first lens group G1 and the second lens group G2.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と、物体側に凸面を向けた正メニスカスレンズＬ４と物体側に凸面を向けた負メニスカスレンズＬ５とからなる接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ６とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, and a positive meniscus lens L3 with a convex surface facing the object side. It is composed of a cemented lens consisting of a positive meniscus lens L4 with a convex surface facing the object side and a negative meniscus lens L5 with a convex surface facing the object side, and a positive meniscus lens L6 with a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ７のみから構成されている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が像面側へ移動する。 The second lens group G2 is composed only of a negative meniscus lens L7 with a convex surface facing the object side. The entire second lens group G2 moves toward the image plane when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、物体側に凸面を向けた負メニスカスレンズＬ８と物体側に凸面を向けた正メニスカスレンズＬ９とからなる接合レンズと、両凹レンズＬ１０と両凸レンズＬ１１からなる接合レンズと、両凸レンズＬ１２と、両凹レンズＬ１３と両凸レンズＬ１４からなる接合レンズと、物体側に凸面を向けた負メニスカスレンズＬ１５とから構成されており、物体側に凸面を向けた負メニスカスレンズＬ１５の両側のレンズ面は所定の非球面形状となっている。 The third lens group G3 includes a cemented lens consisting of a negative meniscus lens L8 with a convex surface facing the object side and a positive meniscus lens L9 with a convex surface facing the object side, a cemented lens consisting of a biconcave lens L10 and a biconvex lens L11, It is composed of a biconvex lens L12, a cemented lens consisting of a biconcave lens L13 and a biconvex lens L14, and a negative meniscus lens L15 with a convex surface facing the object side. The lens surface has a predetermined aspherical shape.
続いて以下に実施例７に係る光学系の諸元値を示す。
数値実施例7
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 66.7187 4.8408 1.59282 68.62
2 102.0378 0.9400
3 85.2808 3.5574 1.98613 16.48
4 127.4938 0.1500
5 44.5530 6.7494 1.55032 75.50
6 79.9368 0.7000
7 34.7396 7.8108 1.55032 75.50
8 80.4369 1.2000 1.85451 25.15 0.6103
9 26.2464 4.0873
10 39.2208 5.2640 1.59282 68.62
11 117.7696 3.3821
12(絞り) ∞ (d12)
13 528.8539 0.9000 1.51680 64.20
14 30.4459 (d14)
15 46.3718 0.9000 1.85451 25.15
16 22.2553 5.2253 1.59282 68.62
17 134.9206 2.8842
18 -55.5020 0.9000 1.77047 29.74
19 42.4361 4.4835 2.00100 29.13
20 -508.7814 0.1500
21 89.9666 4.9390 2.00100 29.13
22 -60.9567 0.1500
23 -98.6150 1.0000 1.59270 35.45
24 46.3270 6.9916 1.95375 32.32
25 -184.7930 0.1500
26* 169.8417 1.7000 1.73077 40.50
27* 37.7358 (BF)
像面 ∞
[非球面データ]
26面 27面
K 0.00000 0.00000
A4 -4.53076E-06 7.52281E-07
A6 1.25283E-09 7.34478E-10
A8 2.23721E-11 2.78219E-11
A10 -3.49418E-14 -3.21470E-14
A12 0.00000E+00 0.00000E+00
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 82.76 80.36
Fナンバー 1.46 1.64
全画角2ω 28.21 23.89
像高Y 21.63 21.63
レンズ全長 111.00 111.00
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 689.0000
d12 2.7577 13.5312
d14 14.3428 3.5693
BF 24.8440 24.8440
[レンズ群データ]
群 始面 焦点距離
G1 1 74.87
G2 13 -62.55
G3 15 59.31
GA(INF) 1 74.87
GB(INF) 13 152.56
Next, the specification values of the optical system according to Example 7 are shown below.
Numerical example 7
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 66.7187 4.8408 1.59282 68.62
2 102.0378 0.9400
3 85.2808 3.5574 1.98613 16.48
4 127.4938 0.1500
5 44.5530 6.7494 1.55032 75.50
6 79.9368 0.7000
7 34.7396 7.8108 1.55032 75.50
8 80.4369 1.2000 1.85451 25.15 0.6103
9 26.2464 4.0873
10 39.2208 5.2640 1.59282 68.62
11 117.7696 3.3821
12 (aperture) ∞ (d12)
13 528.8539 0.9000 1.51680 64.20
14 30.4459 (d14)
15 46.3718 0.9000 1.85451 25.15
16 22.2553 5.2253 1.59282 68.62
17 134.9206 2.8842
18 -55.5020 0.9000 1.77047 29.74
19 42.4361 4.4835 2.00100 29.13
20 -508.7814 0.1500
21 89.9666 4.9390 2.00100 29.13
22 -60.9567 0.1500
23 -98.6150 1.0000 1.59270 35.45
24 46.3270 6.9916 1.95375 32.32
25 -184.7930 0.1500
26* 169.8417 1.7000 1.73077 40.50
27* 37.7358 (BF)
Image plane ∞
[Aspheric data]
26 pages 27 pages
K 0.00000 0.00000
A4 -4.53076E-06 7.52281E-07
A6 1.25283E-09 7.34478E-10
A8 2.23721E-11 2.78219E-11
A10 -3.49418E-14 -3.21470E-14
A12 0.00000E+00 0.00000E+00
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 82.76 80.36
F number 1.46 1.64
Full angle of view 2ω 28.21 23.89
Image height Y 21.63 21.63
Lens total length 111.00 111.00
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 689.0000
d12 2.7577 13.5312
d14 14.3428 3.5693
BF 24.8440 24.8440
[Lens group data]
Group starting plane focal length
G1 1 74.87
G2 13 -62.55
G3 15 59.31
GA(INF) 1 74.87
GB(INF) 13 152.56
図３６は、本発明の実施例８の光学系のレンズ構成図である。 FIG. 36 is a lens configuration diagram of an optical system according to Example 8 of the present invention.
実施例８は物体側から順に、正の屈折力の第１レンズ群Ｇ１、負の屈折力の第２レンズ群Ｇ２、及び正の屈折力の第３レンズ群Ｇ３から構成される。第１レンズ群Ｇ１は前側レンズ群ＧＡに、第２レンズ群Ｇ２は合焦レンズ成分ＬＦに、第２レンズ群Ｇ２と第３レンズ群Ｇ３の合成レンズ群は後続レンズ群ＧＢに、それぞれ相当する。第１レンズ群Ｇ１と第２レンズ群Ｇ２の間には開口絞りＳが配置される。 Embodiment 8 is composed of, in order from the object side, a first lens group G1 with positive refractive power, a second lens group G2 with negative refractive power, and a third lens group G3 with positive refractive power. The first lens group G1 corresponds to the front lens group GA, the second lens group G2 corresponds to the focusing lens component LF, and the composite lens group of the second lens group G2 and third lens group G3 corresponds to the trailing lens group GB. . An aperture stop S is arranged between the first lens group G1 and the second lens group G2.
第１レンズ群Ｇ１は、物体側から順に物体側に凸面を向けた正メニスカスレンズＬ１と、物体側に凸面を向けた正メニスカスレンズＬ２と、物体側に凸面を向けた正メニスカスレンズＬ３と、物体側に凸面を向けた正メニスカスレンズＬ４と物体側に凸面を向けた負メニスカスレンズＬ５とからなる接合レンズと、物体側に凸面を向けた正メニスカスレンズＬ６とから構成されている。 The first lens group G1 includes, in order from the object side, a positive meniscus lens L1 with a convex surface facing the object side, a positive meniscus lens L2 with a convex surface facing the object side, and a positive meniscus lens L3 with a convex surface facing the object side. It is composed of a cemented lens consisting of a positive meniscus lens L4 with a convex surface facing the object side and a negative meniscus lens L5 with a convex surface facing the object side, and a positive meniscus lens L6 with a convex surface facing the object side.
第２レンズ群Ｇ２は、物体側に凸面を向けた負メニスカスレンズＬ７のみから構成されている。第２レンズ群Ｇ２は、無限遠物体距離から近距離へのフォーカシングに際して全体が像面側へ移動する。 The second lens group G2 is composed only of a negative meniscus lens L7 with a convex surface facing the object side. The entire second lens group G2 moves toward the image plane when focusing from an infinite object distance to a short distance.
第３レンズ群Ｇ３は、物体側に凸面を向けた負メニスカスレンズＬ８と物体側に凸面を向けた正メニスカスレンズＬ９とからなる接合レンズと、両凹レンズＬ１０と両凸レンズＬ１１からなる接合レンズと、両凸レンズＬ１２と、両凹レンズＬ１３と、像面側に凸面を向けた負メニスカスレンズＬ１４とから構成されており、像面側に凸面を向けた負メニスカスレンズＬ１４の両側のレンズ面は所定の非球面形状となっている。 The third lens group G3 includes a cemented lens consisting of a negative meniscus lens L8 with a convex surface facing the object side and a positive meniscus lens L9 with a convex surface facing the object side, a cemented lens consisting of a biconcave lens L10 and a biconvex lens L11, It is composed of a biconvex lens L12, a biconcave lens L13, and a negative meniscus lens L14 with a convex surface facing the image side.The lens surfaces on both sides of the negative meniscus lens L14 with a convex surface facing the image side have a predetermined non-convex lens. It has a spherical shape.
続いて以下に実施例８に係る光学系の諸元値を示す。
数値実施例8
単位：mm
[面データ]
面番号 r d nd vd θgF
物面 ∞ (d0)
1 75.1360 4.9683 1.94595 17.98
2 108.7796 0.7008
3 72.0133 7.6952 1.49700 81.61
4 201.9173 0.1505
5 52.8849 7.7401 1.55032 75.50
6 109.0071 0.7014
7 42.3583 9.8409 1.55032 75.50
8 185.8699 1.4145 1.85478 24.80 0.6122
9 28.3892 4.1546
10 40.7116 5.9258 1.59282 68.62
11 133.8591 3.2746
12(絞り) ∞ (d12)
13 748.3825 1.0000 1.51742 52.15
14 27.8032 (d14)
15 57.6019 0.9000 1.85478 24.80
16 22.0448 4.4306 1.59282 68.62
17 70.6361 2.0772
18 -273.8246 3.6905 1.85478 24.80
19 249.0544 4.8513 1.75211 25.05
20 -167.0896 1.3555
21 86.6575 6.1668 1.85478 24.80
22 -39.6263 0.1500
23 -52.9068 1.0000 1.59282 68.62
24 148.4221 3.0237
25* -90.9091 1.7000 1.55332 71.68
26* -200.0000 (BF)
像面 ∞
[非球面データ]
25面 26面
K 0.00000 0.00000
A4 3.12417E-06 4.45226E-06
A6 -2.56986E-08 -2.50901E-08
A8 7.34761E-11 5.35729E-11
A10 -2.15651E-14 2.06254E-14
A12 -1.12678E-16 -1.42678E-16
A14 0.00000E+00 0.00000E+00
[各種データ]
INF 撮影距離800mm
焦点距離 131.00 110.13
Fナンバー 1.85 2.10
全画角2ω 18.04 15.43
像高Y 21.63 21.63
レンズ全長 129.50 129.50
[可変間隔データ]
INF 撮影距離800mm
d0 ∞ 670.5000
d12 5.8971 18.7224
d14 17.6904 4.8651
BF 29.0000 29.0000
[レンズ群データ]
群 始面 焦点距離
G1 1 78.09
G2 13 -55.83
G3 15 104.47
GA(INF) 1 78.09
GB(INF) 13 -368.14
Next, the specification values of the optical system according to Example 8 are shown below.
Numerical example 8
Unit: mm
[Surface data]
Surface number rd nd vd θgF
Object surface ∞ (d0)
1 75.1360 4.9683 1.94595 17.98
2 108.7796 0.7008
3 72.0133 7.6952 1.49700 81.61
4 201.9173 0.1505
5 52.8849 7.7401 1.55032 75.50
6 109.0071 0.7014
7 42.3583 9.8409 1.55032 75.50
8 185.8699 1.4145 1.85478 24.80 0.6122
9 28.3892 4.1546
10 40.7116 5.9258 1.59282 68.62
11 133.8591 3.2746
12 (aperture) ∞ (d12)
13 748.3825 1.0000 1.51742 52.15
14 27.8032 (d14)
15 57.6019 0.9000 1.85478 24.80
16 22.0448 4.4306 1.59282 68.62
17 70.6361 2.0772
18 -273.8246 3.6905 1.85478 24.80
19 249.0544 4.8513 1.75211 25.05
20 -167.0896 1.3555
21 86.6575 6.1668 1.85478 24.80
22 -39.6263 0.1500
23 -52.9068 1.0000 1.59282 68.62
24 148.4221 3.0237
25* -90.9091 1.7000 1.55332 71.68
26* -200.0000 (BF)
Image plane ∞
[Aspheric data]
25 pages 26 pages
K 0.00000 0.00000
A4 3.12417E-06 4.45226E-06
A6 -2.56986E-08 -2.50901E-08
A8 7.34761E-11 5.35729E-11
A10 -2.15651E-14 2.06254E-14
A12 -1.12678E-16 -1.42678E-16
A14 0.00000E+00 0.00000E+00
[Various data]
INF shooting distance 800mm
Focal length 131.00 110.13
F number 1.85 2.10
Full angle of view 2ω 18.04 15.43
Image height Y 21.63 21.63
Lens total length 129.50 129.50
[Variable interval data]
INF shooting distance 800mm
d0 ∞ 670.5000
d12 5.8971 18.7224
d14 17.6904 4.8651
BF 29.0000 29.0000
[Lens group data]
Group starting plane focal length
G1 1 78.09
G2 13 -55.83
G3 15 104.47
GA(INF) 1 78.09
GB(INF) 13 -368.14
以下に上記の各実施例に対応する条件式対応値を示す。
EX1 EX2 EX3 EX4
（１） １．８５＜ＮＤ＿ＬＰＨ 1.95 2.00 2.00 1.92
（２） ＶＤ＿ＬＰＨ＜２９．０ 18.0 25.5 25.5 20.9
（３） ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ＜０．３５ 0.00 0.00 0.00 0.00
（４） ６０．０＜ＶＤ＿ＬＰＬ 72.1 79.7 88.4 73.2
（５） ０．２０＜ｆ／ｆＡ＜２．５０ 1.13 0.51 0.65 0.41
（６） －１．００＜ｆ/ｆＢ＜２．００ 0.52 1.06 1.00 1.38
（７） ＶＤ＿ＬＮ＜３０．０ 25.2 25.2 25.2 24.8
（８） ※１ 0.007 0.007 0.007 0.009
EX5 EX6 EX7 EX8
（１） １．８５＜ＮＤ＿ＬＰＨ 1.92 1.92 1.99 1.95
（２） ＶＤ＿ＬＰＨ＜２９．０ 20.9 20.9 16.5 18.0
（３） ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ＜０．３５ 0.00 0.00 0.16 0.00
（４） ６０．０＜ＶＤ＿ＬＰＬ 73.2 73.2 72.1 75.3
（５） ０．２０＜ｆ／ｆＡ＜２．５０ 0.43 1.12 1.11 1.68
（６） －１．００＜ｆ/ｆＢ＜２．００ 1.35 0.52 0.54 -0.36
（７） ＶＤ＿ＬＮ＜３０．０ 24.8 24.8 25.2 24.8
（８） ※１ 0.009 0.009 0.007 0.009
※1の条件式は、ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ）＜０．０１０
Conditional expression corresponding values corresponding to each of the above embodiments are shown below.
EX1 EX2 EX3 EX4
(1) 1.85<ND_LPH 1.95 2.00 2.00 1.92
(2) VD_LPH<29.0 18.0 25.5 25.5 20.9
(3) LD_LPH1/D_GA<0.35 0.00 0.00 0.00 0.00
(4) 60.0<VD_LPL 72.1 79.7 88.4 73.2
(5) 0.20<f/fA<2.50 1.13 0.51 0.65 0.41
(6) -1.00<f/fB<2.00 0.52 1.06 1.00 1.38
(7) VD_LN<30.0 25.2 25.2 25.2 24.8
(8) *1 0.007 0.007 0.007 0.009
EX5 EX6 EX7 EX8
(1) 1.85<ND_LPH 1.92 1.92 1.99 1.95
(2) VD_LPH<29.0 20.9 20.9 16.5 18.0
(3) LD_LPH1/D_GA<0.35 0.00 0.00 0.16 0.00
(4) 60.0<VD_LPL 73.2 73.2 72.1 75.3
(5) 0.20<f/fA<2.50 0.43 1.12 1.11 1.68
(6) -1.00<f/fB<2.00 1.35 0.52 0.54 -0.36
(7) VD_LN<30.0 24.8 24.8 25.2 24.8
(8) *1 0.009 0.009 0.007 0.009
*The conditional expression for 1 is ΘgF_LN-(0.648285-0.00180123×VD_LN)<0.010
Ｓ：開口絞り
Ｉ：像面
Ｇ１：第１レンズ群
Ｇ２：第２レンズ群
Ｇ３：第３レンズ群
Ｇ４：第４レンズ群
Ｇ５：第５レンズ群
ＧＦ：合焦レンズ群
ＧＡ：前側レンズ群
ＧＢ：後続レンズ群
Ｃ Ｃ線（波長λ＝６５６．３ｎｍ）
ｄ ｄ線（波長λ＝５８７．６ｎｍ）
ｇ ｇ線（波長λ＝４３５．８ｎｍ）
Ｙ 像高
ΔＳ サジタル像面
ΔＭ メジオナル像面
S: Aperture stop I: Image plane G1: First lens group G2: Second lens group G3: Third lens group G4: Fourth lens group G5: Fifth lens group GF: Focusing lens group GA: Front lens group GB : Subsequent lens group C C line (wavelength λ = 656.3 nm)
d d-line (wavelength λ = 587.6 nm)
g g line (wavelength λ = 435.8 nm)
Y Image height ΔS Sagittal image plane ΔM Median image plane
Claims (23)
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one of the lenses LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the lens group GF has positive refractive power adjacent to the aperture stop S. moves during focusing, and at least one of the lenses LPH having positive refractive power is disposed closest to the object side.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７´）ＶＤ＿ＬＮ ＜ ２６．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one lens LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7') and the following conditional expression (4). It has a lens LN with negative refractive power that satisfies formula (8), and the lens LN with negative refractive power is the most An optical system characterized by having strong negative refractive power .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7')VD_LN < 26.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ＜ ＶＤ＿ＬＰＬ
（７´´）ＶＤ＿ＬＮ ＜ ２８．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one lens LPH having refractive power satisfies the following conditional expression (3), and further satisfies the following conditional expression (4''), and the front lens group GA satisfies the following conditional expression (7'' ) and conditional expression (8) , the lens LN having negative refractive power is among the lenses having negative refractive power included in the front lens group GA. An optical system characterized by having the strongest negative refractive power .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 < VD_LPL
(7'')VD_LN < 28.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜
０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2), At least one lens LPH having a refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4'), and the front lens group GA satisfies the following conditional expression (7). It has a lens LN having a negative refractive power that satisfies conditional expression (8), and the lens LN having a negative refractive power is among the lenses having a negative refractive power included in the front lens group GA, An optical system characterized by having the strongest negative refractive power .
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <
0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜
０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2'), and the At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and the front lens group GA satisfies the following conditional expression (7). ) and conditional expression (8), the lens LN having negative refractive power is among the lenses having negative refractive power included in the front lens group GA. An optical system characterized by having the strongest negative refractive power .
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <
0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
VD_LN: Abbe number at the d-line of the lens LN having negative refractive power
ΘgF_LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7) and conditional expression It has a lens LN having a negative refractive power that satisfies (8), and upon focusing, a lens component LF having a negative refractive power adjacent to the aperture stop S moves, and upon focusing, further, An optical system characterized in that a lens component LFP having a positive refractive power and disposed on the image plane side of the lens component LF moves along a trajectory different from that of the lens component LF .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the subsequent lens group GB has an aspherical surface, and when focusing The lens component LF having a negative refractive power adjacent to the aperture stop S moves, and upon focusing, the lens component LFP having a positive refractive power disposed on the image plane side of the lens component LF moves . , an optical system that moves along a different trajectory from the lens component LF .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2), At least one of the lenses LPH having a refractive power of The lens component LF having a refractive power moves, and upon focusing, the lens component LFP having a positive refractive power, which is disposed on the image plane side of the lens component LF, moves on a different trajectory from the lens component LF. An optical system characterized by moving along .
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2'), and the At least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4''), and is adjacent to the aperture stop S during focusing. The lens component LF having a negative refractive power moves, and upon focusing, a lens component LFP having a positive refractive power disposed on the image plane side of the lens component LF is moved, which is different from the lens component LF. An optical system that moves along a trajectory .
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2), At least one of the lenses LPH having a refractive power satisfies the following conditional expression (3), and further satisfies the following conditional expression (4') , and at least one of the lenses LPH having a positive refractive power An optical system characterized by being located closest to the object side .
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2'), and the At least one of the lenses LPH having a positive refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4'') , and at least one of the lenses LPH having a positive refractive power satisfies the following conditional expression (4''). An optical system characterized in that one lens is placed closest to the object side .
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７´）ＶＤ＿ＬＮ ＜ ２６．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7') and the following conditional expression (4). An optical system comprising a lens LN having a negative refractive power that satisfies Equation (8), and at least one of the lenses LPH having a positive refractive power being disposed closest to the object side .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7')VD_LN < 26.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ＜ ＶＤ＿ＬＰＬ
（７´´）ＶＤ＿ＬＮ ＜ ２８．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one lens LPH having refractive power satisfies the following conditional expression (3), and further satisfies the following conditional expression (4''), and the front lens group GA satisfies the following conditional expression (7'' ) and a lens LN having a negative refractive power that satisfies conditional expression (8), and at least one of the lenses LPH having a positive refractive power is disposed closest to the object side . system.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4'') 70.0 < VD_LPL
(7'')VD_LN < 28.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´）０．３０ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3'), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7) and the following conditional expression (4). It has a lens LN with negative refractive power that satisfies formula (8), and the lens LN with negative refractive power is the most An optical system characterized in that at least one of the lenses LPH having strong negative refractive power and positive refractive power is disposed closest to the object side .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3')0.30 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one lens LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7) and conditional expression It has a lens LN having a negative refractive power that satisfies (8), and a lens component LF having a negative refractive power adjacent to the aperture stop S moves during focusing, and has the positive refractive power. An optical system characterized in that at least one of the lenses LPH is disposed closest to the object side .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３）０．３５ ＞ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having refractive power satisfies the following conditional expression (3), further satisfies the following conditional expression (4), the succeeding lens group GB has an aspherical surface, and the aperture stop S An optical system characterized in that a lens component LF having a negative refractive power adjacent to the lens moves during focusing, and at least one of the lenses LPH having a positive refractive power is disposed closest to the object side. .
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3) 0.35 > LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´）７２．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2), An optical system characterized in that at least one of the lenses LPH having a refractive power satisfies the following conditional expression (3'') and further satisfies the following conditional expression (4').
(1') 1.94 ≦ ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4')72.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１´）１．９４ ≦ ＮＤ＿ＬＰＨ
（２´）２６．０ ≧ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ≦ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1') and (2'), and the An optical system characterized in that at least one of the lenses LPH having positive refractive power satisfies the following conditional expression (3'') and further satisfies the following conditional expression (4'').
(1') 1.94 ≦ ND_LPH
(2')26.0 ≧ VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4'') 70.0 ≦ VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７´）ＶＤ＿ＬＮ ＜ ２６．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3'') , further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7'). An optical system characterized by having a lens LN having a negative refractive power that satisfies conditional expression (8).
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7')VD_LN < 26.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４´´）７０．０ ＜ ＶＤ＿ＬＰＬ
（７´´）ＶＤ＿ＬＮ ＜ ２８．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3'') , further satisfies the following conditional expression (4''), and the front lens group GA satisfies the following conditional expression (7''). '') and a lens LN having negative refractive power that satisfies conditional expression (8).
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4'') 70.0 < VD_LPL
(7'')VD_LN < 28.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3'') , further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7). It has a lens LN having a negative refractive power that satisfies conditional expression (8), and the lens LN having a negative refractive power is, among the lenses having a negative refractive power included in the front lens group GA, An optical system characterized by having the strongest negative refractive power.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio for the g-line of the lens LN having negative refractive power
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
（７）ＶＤ＿ＬＮ ＜ ３０．０
（８）ΘｇＦ＿ＬＮ－（０．６４８２８５－０．００１８０１２３×ＶＤ＿ＬＮ） ＜０．０１０
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値
ＶＤ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｄ線におけるアッベ数
ΘｇＦ＿ＬＮ：前記負の屈折力を有するレンズＬＮのｇ線に対する部分分散比 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA has one or more lenses LPH that have a positive refractive power that satisfies the following conditional expressions (1) and (2), At least one lens LPH having refractive power satisfies the following conditional expression (3'') , further satisfies the following conditional expression (4), and the front lens group GA satisfies the following conditional expression (7). An optical system comprising a lens LN having a negative refractive power that satisfies conditional expression (8), wherein a lens component LF having a negative refractive power adjacent to the aperture stop S moves during focusing. system.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
(7) VD_LN < 30.0
(8) ΘgF_LN-(0.648285-0.00180123×VD_LN) <0.010
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA during infinity photography VD_LPL: Average value of Abbe numbers at the d-line of lenses other than the positive refractive power lens LPH among the lenses having positive refractive power constituting the front lens group GA VD_LN: The lens having negative refractive power Abbe number ΘgF_LN at the d-line of LN: partial dispersion ratio of the lens LN having negative refractive power at the g-line
（１）１．８５ ＜ ＮＤ＿ＬＰＨ
（２）２９．０ ＞ ＶＤ＿ＬＰＨ
（３´´）０．１７ ≧ ＬＤ＿ＬＰＨ１／Ｄ＿ＧＡ
（４）６０．０ ＜ ＶＤ＿ＬＰＬ
ただし、
ＮＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線における屈折率
ＶＤ＿ＬＰＨ：前記正の屈折力を有するレンズＬＰＨのｄ線におけるアッベ数
ＬＤ＿ＬＰＨ１：無限遠撮影時の前記前側レンズ群ＧＡの最も物体側の面から、前記正の屈折力を有するレンズＬＰＨのうち１枚のレンズの最も物体側の面までの光軸上の距離
Ｄ＿ＧＡ：無限遠撮影時の前記前側レンズ群ＧＡの光軸上の全長
ＶＤ＿ＬＰＬ：前記前側レンズ群ＧＡを構成する正の屈折力を有するレンズのうち、前記正の屈折力を有するレンズＬＰＨ以外のもののｄ線におけるアッベ数の平均値 In order from the object side, the front lens group GA is composed of a front lens group GA having a positive refractive power, an aperture diaphragm S, and a trailing lens group GB. The front lens group GA includes one or more lenses having a positive refractive power, and the front lens group GA has one or more lenses LPH having a positive refractive power that satisfies the following conditional expressions (1) and (2). At least one of the lenses LPH having refractive power satisfies the following conditional expression (3'') , further satisfies the following conditional expression (4), the succeeding lens group GB has an aspherical surface, and the aperture An optical system characterized in that a lens component LF having a negative refractive power adjacent to an aperture S moves during focusing.
(1) 1.85 < ND_LPH
(2) 29.0 > VD_LPH
(3'')0.17 ≧ LD_LPH1/D_GA
(4) 60.0 < VD_LPL
however,
ND_LPH: refractive index at the d-line of the lens LPH having positive refractive power VD_LPH: Abbe number at the d-line of the lens LPH having positive refractive power LD_LPH1: closest to the object side of the front lens group GA during infinity photography Distance on the optical axis from the surface of the lens LPH having the positive refractive power to the surface closest to the object side of one of the lenses LPH: total length on the optical axis of the front lens group GA when photographing at infinity VD_LPL: Average value of the Abbe numbers at the d-line of lenses other than the lens LPH, among the lenses having positive refractive power constituting the front lens group GA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019213387A JP7423044B2 (en) | 2019-11-26 | 2019-11-26 | Optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019213387A JP7423044B2 (en) | 2019-11-26 | 2019-11-26 | Optical system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2021085935A JP2021085935A (en) | 2021-06-03 |
| JP2021085935A5 JP2021085935A5 (en) | 2022-09-08 |
| JP7423044B2 true JP7423044B2 (en) | 2024-01-29 |
Family
ID=76087512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019213387A Active JP7423044B2 (en) | 2019-11-26 | 2019-11-26 | Optical system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP7423044B2 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013101238A (en) | 2011-11-09 | 2013-05-23 | Canon Inc | Zoom lens and imaging apparatus including the same |
| JP2014038305A (en) | 2012-07-20 | 2014-02-27 | Panasonic Corp | Inner focus lens system, interchangeable lens device and camera system |
| JP2019144441A (en) | 2018-02-22 | 2019-08-29 | 株式会社シグマ | Macro lens |
| JP2019191229A (en) | 2018-04-19 | 2019-10-31 | 株式会社シグマ | Imaging optical system |
| WO2019220614A1 (en) | 2018-05-18 | 2019-11-21 | 株式会社ニコン | Optical system, optical device, and method for manufacturing optical system |
| JP2020122941A (en) | 2019-01-31 | 2020-08-13 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
-
2019
- 2019-11-26 JP JP2019213387A patent/JP7423044B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013101238A (en) | 2011-11-09 | 2013-05-23 | Canon Inc | Zoom lens and imaging apparatus including the same |
| JP2014038305A (en) | 2012-07-20 | 2014-02-27 | Panasonic Corp | Inner focus lens system, interchangeable lens device and camera system |
| JP2019144441A (en) | 2018-02-22 | 2019-08-29 | 株式会社シグマ | Macro lens |
| JP2019191229A (en) | 2018-04-19 | 2019-10-31 | 株式会社シグマ | Imaging optical system |
| WO2019220614A1 (en) | 2018-05-18 | 2019-11-21 | 株式会社ニコン | Optical system, optical device, and method for manufacturing optical system |
| JP2020122941A (en) | 2019-01-31 | 2020-08-13 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021085935A (en) | 2021-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7227700B2 (en) | Wide zoom lens system | |
| EP1895346B1 (en) | Zoom lens | |
| JP5197242B2 (en) | Zoom lens and imaging apparatus having the same | |
| US7251081B2 (en) | Zoom lens system | |
| JP5241281B2 (en) | Zoom lens and imaging apparatus having the same | |
| EP2048531A1 (en) | Rear-focusing type zoom lens and imaging apparatus | |
| JP5718351B2 (en) | Zoom lens and imaging device | |
| JP2009223008A5 (en) | ||
| JP5919519B2 (en) | Zoom lens system, imaging device and camera | |
| US6931207B2 (en) | Zoom lens system and camera having the same | |
| JP4982799B2 (en) | Zoom lens | |
| JP5632714B2 (en) | Eyepiece zoom optical system and optical apparatus | |
| JP7396473B2 (en) | Optical system and optical equipment | |
| JP4313864B2 (en) | Zoom lens | |
| JP2023065618A (en) | Optical system, optical device, and method of manufacturing optical system | |
| WO2013031180A1 (en) | Zoom lens and imaging device | |
| JP7106099B2 (en) | Imaging optical system | |
| JP5919518B2 (en) | Zoom lens system, imaging device and camera | |
| JP2018189733A (en) | Wide-angle lens system | |
| JP7399471B2 (en) | Large diameter optical system | |
| JP6164894B2 (en) | Zoom lens and imaging apparatus having the same | |
| JP7162883B2 (en) | Wide-angle lens system | |
| JP7160326B2 (en) | Wide-angle lens system | |
| WO2013031110A1 (en) | Zoom lens and imaging device | |
| JP2014202806A5 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20220831 |
|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20220831 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20230524 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230620 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230720 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230905 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20231011 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20240109 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20240110 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 7423044 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |