JP6402571B2 - Telephoto zoom lens with anti-vibration function - Google Patents
Telephoto zoom lens with anti-vibration function Download PDFInfo
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Description
本発明は、デジタルカメラ、銀塩カメラ及びビデオカメラ等に最適であり、ズーム比が３倍程度であり、ズーミングに際してＦ値が固定の防振機能を有する望遠ズームレンズに関する。 The present invention relates to a telephoto zoom lens that is optimal for a digital camera, a silver salt camera, a video camera, and the like, has a zoom ratio of about 3 times, and has an anti-vibration function with a fixed F value during zooming.
ズーム比が３倍程度であり、ズーミングに際してＦ値が固定の防振機能を有する望遠ズームレンズとして、例えば以下の特許文献が挙げられる。 As a telephoto zoom lens having an anti-vibration function having a zoom ratio of about 3 times and a fixed F value during zooming, for example, the following patent documents can be cited.
しかしながら、特許文献１が開示する、ズーム比が３倍程度であり、ズーミングに際してＦ値が固定の防振機能を有する望遠ズームレンズは、フォーカシング時の性能変動、特に、像面湾曲及び球面収差の変動が大きいという課題がある。
However, the telephoto zoom lens disclosed in
また、特許文献２及び３記載の、ズーム比が３倍程度であり、ズーミングに際してＦ値が固定の防振機能を有する望遠ズームレンズは、フォーカシング時の収差変動は比較的抑えられているが、光線高がレンズ全系のうち比較的高い前側にフォーカスレンズを配置しているため、フォーカスレンズ群が大型化してしまう傾向にあった。
In addition, in the telephoto zoom lens described in
そこで本発明は、以下に示す手段により、フォーカスレンズ群を大型化せずに、フォーカシング時の性能変動を抑え、良好な光学性能を得ることが可能な、ズーム比が３倍程度であり、ズーミングに際してＦ値が固定の、防振機能を有する望遠ズームレンズを提供する。 In view of this, the present invention provides a zoom ratio of about 3 times, which can suppress the performance fluctuation at the time of focusing without increasing the size of the focus lens group and obtain a good optical performance by the means shown below. At the same time, a telephoto zoom lens having a fixed F value and having an image stabilization function is provided.
本発明の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、正の屈折力を有する第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、正の屈折力を有する第５レンズ群Ｌ５と、から成り、広角側から望遠側のズーミングにおいて、前記第１レンズ群Ｌ１と、前記第５レンズ群Ｌ５は像面に対して固定であり、物体距離無限遠から近距離へのフォーカシングに際しては、前記第３レンズ群Ｌ３が光軸に沿って像側へ移動し、前記第５レンズ群Ｌ５内の一部を略垂直方向に移動させることで像を光軸に対して垂直方向に移動することが可能であり、以下の条件式を満足することを特徴とする防振機能を有する望遠ズームレンズである。
１．２１＜｜βｂ３ｔ＾２・（β３ｔ＾２−１）｜＜６．５０ （１）
β３ｔ：前記第３レンズ群Ｌ３の望遠端における物体距離無限遠での横倍率
βｂ３ｔ：前記第３レンズ群Ｌ３より像側に位置するレンズ系の望遠端における物体距離無限遠での横倍率
The telephoto zoom lens having the image stabilization function of the present invention includes, in order from the object side to the image side, a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a positive refraction. A third lens unit L3 having power, a fourth lens unit L4 having positive refractive power, and a fifth lens unit L5 having positive refractive power. In zooming from the wide angle side to the telephoto side, The first lens unit L1 and the fifth lens unit L5 are fixed with respect to the image plane, and the third lens unit L3 moves to the image side along the optical axis when focusing from infinity to short distance. and state, and are able to move vertically the image with respect to the optical axis by moving substantially vertically a portion of said fifth lens group L5, that you satisfy the following condition This is a telephoto zoom lens having a characteristic image stabilization function.
1.21 <| βb3t ^ 2 · (β3t ^ 2-1) | <6.50 (1)
β3t: Lateral magnification at infinite object distance at the telephoto end of the third lens unit L3 βb3t: Lateral magnification at infinite object distance at the telephoto end of the lens system located on the image side from the third lens unit L3
また、本発明の防振機能を有する望遠ズームレンズは、以下の条件式を満足することを特徴とする。
２．６０＜｜β３ｔ｜＜１１．９５ （２）
β３ｔ：前記第３レンズ群Ｌ３の望遠端における物体距離無限遠での横倍率
In addition, a telephoto zoom lens having an image stabilization function according to the present invention satisfies the following conditional expression.
2.60 <| β3t | <11.95 (2)
β3t: lateral magnification at infinite object distance at the telephoto end of the third lens unit L3
また、本発明の防振機能を有する望遠ズームレンズにおいて、前記第５レンズ群Ｌ５は、物体側から像側へ順に、正の屈折力を有する第５ａレンズ成分Ｌ５ａと、負の屈折力を有する第５ｂレンズ成分Ｌ５ｂと、正の屈折力を有する第５ｃレンズ成分Ｌ５ｃと、から成り、前記第５ｂレンズ成分Ｌ５ｂを光軸に対して略垂直方向に移動させることで像を光軸に対して垂直方向に移動することが可能であり、以下の条件式を満足することを特徴とする。
０．３９＜｜βｂ５ｂ・（１−β５ｂ）｜＜２．３４ （３）
β５ｂ：前記レンズ成分Ｌ５ｂの物体距離無限遠での横倍率
βｂ５ｂ：前記レンズ成分Ｌ５ｂより像側に位置するレンズ系の物体距離無限遠での横倍率
In the telephoto zoom lens having the image stabilization function of the present invention, the fifth lens unit L5 has a negative refractive power and a fifth-a lens component L5a having a positive refractive power in order from the object side to the image side. A fifth-b lens component L5b and a fifth-c lens component L5c having a positive refractive power, and moving the fifth-b lens component L5b in a direction substantially perpendicular to the optical axis to thereby shift the image relative to the optical axis. It can move in the vertical direction and satisfies the following conditional expression.
0.39 <| βb5b · (1-β5b) | <2.34 (3)
β5b: lateral magnification of the lens component L5b at infinite object distance βb5b: lateral magnification of the lens system positioned on the image side from the lens component L5b at infinite object distance
また、本発明の防振機能を有する望遠ズームレンズは、以下の条件式を満足することを特徴とする。
０．４９＜｜β２ｔ｜＜１．２６ （４）
β２ｔ：前記第２レンズ群Ｌ２の望遠端における物体距離無限遠での横倍率
In addition, a telephoto zoom lens having an image stabilization function according to the present invention satisfies the following conditional expression.
0.49 <| β2t | <1.26 (4)
β2t: lateral magnification at infinite object distance at the telephoto end of the second lens unit L2
本発明により、フォーカスレンズを大型化することなく、フォーカシング時の性能変動を抑えた良好な光学性能を得ることが可能な、防振機能を有する望遠ズームレンズを提供することが可能となる。 According to the present invention, it is possible to provide a telephoto zoom lens having an anti-vibration function capable of obtaining good optical performance with suppressed performance fluctuation during focusing without increasing the size of the focus lens.
以下、本発明の実施形態に係る防振機能を有する望遠ズームレンズについて説明する。なお、明細書において、「レンズ成分」とは、単レンズや接合レンズやレンズの集合を含む広い概念である。従って、１つのレンズ成分とは、その最も広い概念においては１つのレンズ群と同じである。 Hereinafter, a telephoto zoom lens having an image stabilization function according to an embodiment of the present invention will be described. In the specification, “lens component” is a broad concept including a single lens, a cemented lens, and a group of lenses. Thus, one lens component is the same as one lens group in its broadest concept.
本発明の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、正の屈折力を有する第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、正の屈折力を有する第５レンズ群Ｌ５と、から成り、広角側から望遠側のズーミングにおいて、前記第１レンズ群Ｌ１と、前記第５レンズ群Ｌ５は像面に対して固定であり、物体距離無限遠から近距離へのフォーカシングに際しては、前記第３レンズ群Ｌ３が光軸に沿って像側へ移動し、前記第５レンズ群Ｌ５内の一部を略垂直方向に移動させることで像を光軸に対して垂直方向に移動することが可能であることを特徴とする。 The telephoto zoom lens having the image stabilization function of the present invention includes, in order from the object side to the image side, a first lens unit L1 having a positive refractive power, a second lens unit L2 having a negative refractive power, and a positive refraction. A third lens unit L3 having power, a fourth lens unit L4 having positive refractive power, and a fifth lens unit L5 having positive refractive power. In zooming from the wide angle side to the telephoto side, The first lens unit L1 and the fifth lens unit L5 are fixed with respect to the image plane, and the third lens unit L3 moves to the image side along the optical axis when focusing from infinity to short distance. The image can be moved in the vertical direction with respect to the optical axis by moving a part of the fifth lens unit L5 in the substantially vertical direction.
また、本発明の防振機能を有する望遠ズームレンズは、以下の条件式を満足することを特徴とする。
１．２１＜｜βｂ３ｔ＾２・（β３ｔ＾２−１）｜＜６．５０ （１）
β３ｔ：前記第３レンズ群Ｌ３の望遠端における物体距離無限遠での横倍率
βｂ３ｔ：前記第３レンズ群Ｌ３より像側に位置するレンズ系の望遠端における物体距離無限遠での横倍率
In addition, a telephoto zoom lens having an image stabilization function according to the present invention satisfies the following conditional expression.
1.21 <| βb3t ^ 2 · (β3t ^ 2-1) | <6.50 (1)
β3t: Lateral magnification at infinite object distance at the telephoto end of the third lens unit L3 βb3t: Lateral magnification at infinite object distance at the telephoto end of the lens system located on the image side from the third lens unit L3
条件式（１）は、フォーカス時の最適な移動量を決定するために、フォーカス敏感度を規定したものである。 Conditional expression (1) defines the focus sensitivity in order to determine the optimum amount of movement during focusing.
フォーカス敏感度ｋは、フォーカス群の光軸に沿った移動量Δｓに対する像面移動量Δｆｂの比であり、以下の（参考式ａ）で表すことができる。
（参考式ａ） ｋ＝Δｆｂ／Δｓ＝βｂｆ＾２×（βｆ＾２−１）
ｋ：フォーカス敏感度
Δｆｂ：像面移動量
Δｓ：フォーカス群の光軸に沿った移動量
βｂｆ：物体距離無限遠でのフォーカス群以降のレンズ系の横倍率
βｆ：物体距離無限遠でのフォーカス群の横倍率
The focus sensitivity k is the ratio of the image plane movement amount Δfb to the movement amount Δs along the optical axis of the focus group, and can be expressed by the following (reference equation a).
(Reference Equation a) k = Δfb / Δs = βbf ^ 2 × (βf ^ 2-1)
k: focus sensitivity Δfb: image plane movement amount Δs: movement amount along the optical axis of the focus group βbf: lateral magnification of the lens system after the focus group at the object distance infinity βf: focus group at the object distance infinity Horizontal magnification of
（参考式ａ）から、フォーカス群の横倍率βｆが等倍から離れるにつれ、フォーカス敏感度ｋが大きくなることがわかる。フォーカス敏感度ｋが大きくなるということは、同じ像面移動量Δｆｂに対するフォーカス群の光軸に沿った移動量Δｓを小さくできることになるため、移動量Δｓが小さくなる分、全長方向を小型化することができる。 From (reference formula a), it can be seen that the focus sensitivity k increases as the lateral magnification βf of the focus group departs from the same magnification. The increase in focus sensitivity k means that the movement amount Δs along the optical axis of the focus group with respect to the same image plane movement amount Δfb can be reduced. Therefore, the movement amount Δs is reduced, so that the entire length direction is reduced. be able to.
条件式（１）の上限値を超え、フォーカス敏感度が大きくなると、前述の通り、フォーカス群の移動量が抑えられるため、小型化には有利になるが、フォーカス時の球面収差、非点収差変動が大きくなるだけでなく、製造誤差による性能劣化が大きくなるため、所望の光学性能を確保することが困難となる。 If the upper limit of conditional expression (1) is exceeded and the focus sensitivity increases, as described above, the amount of movement of the focus group is suppressed, which is advantageous for miniaturization. However, spherical aberration and astigmatism during focusing are advantageous. Not only will the fluctuations increase, but performance degradation due to manufacturing errors will increase, making it difficult to ensure desired optical performance.
条件式（１）の下限値を超え、フォーカス敏感度が小さくなると、フォーカス時の移動量が増大し、レンズ全系の全長が長くなるため、小型化が困難となる。 If the lower limit of conditional expression (1) is exceeded and the focus sensitivity decreases, the amount of movement during focusing increases and the entire length of the entire lens system increases, making it difficult to reduce the size.
なお、上述した条件式（１）について、その下限値は１．４０に、また上限値をさらに５．５０に規定することで、前述の効果をより確実にすることができる。 In the above-described conditional expression (1), the lower limit value is set to 1.40 and the upper limit value is further set to 5.50, so that the above-described effect can be further ensured.
また、本発明の防振機能を有する望遠ズームレンズは、以下の条件式を満足することを特徴とする。
２．６０＜｜β３ｔ｜＜１１．９５ （２）
β３ｔ：前記第３レンズ群Ｌ３の望遠端における物体距離無限遠での横倍率
In addition, a telephoto zoom lens having an image stabilization function according to the present invention satisfies the following conditional expression.
2.60 <| β3t | <11.95 (2)
β3t: lateral magnification at infinite object distance at the telephoto end of the third lens unit L3
条件式（２）は高性能化と、ウォブリング時の像高の変化率を抑えるために、前記第３レンズ群Ｌ３の望遠端における物体距離無限遠での横倍率を規定したものである。 Conditional expression (2) defines the lateral magnification at the infinite object distance at the telephoto end of the third lens unit L3 in order to improve the performance and suppress the rate of change of the image height during wobbling.
ウォブリングとは、フォーカシングの際、合焦のずれ方向を検出するために、フォーカス群を光軸方向の前後に微小駆動させることである。ウォブリングの際の像高変化率が大きいと、鑑賞者が、フォーカシングしている際の像の倍率変化を認識してしまうため、目障りとなってしまう。従って、ウォブリング時の像高変化率は小さくする必要がある。 The wobbling means that the focus group is finely driven back and forth in the optical axis direction in order to detect the direction of defocusing during focusing. If the rate of change in image height during wobbling is large, the viewer recognizes a change in the magnification of the image during focusing, which is obstructive. Therefore, it is necessary to reduce the image height change rate during wobbling.
像高をｙ、ウォブリング時の像高変化量をΔｙ，ウォブリング時のデフォーカス量をΔｄｅｆとすると、像高変化率は、係数Ｋｗ＝Δｙ／（ｙ・Δｄｅｆ）で表すことができる。この関係式から、係数Ｋｗが大きいほど、ウォブリング時の像高変化率は大きくなることが分かる。 If the image height is y, the image height change amount during wobbling is Δy, and the defocus amount during wobbling is Δdef, the image height change rate can be expressed by a coefficient Kw = Δy / (y · Δdef). From this relational expression, it can be seen that the larger the coefficient Kw, the larger the image height change rate during wobbling.
また、係数Ｋｗは以下の（参考式ｂ）にて近似的に表すことができる。
（参考式ｂ） Ｋｗ＝（βｆ／Ｆｆ・Ｋｆ）−（Ｆｂ・βｂｆ）＾−１−（ｔａｎθ／ｙ）
βｆ：フォーカス群の横倍率
Ｆｆ：フォーカス群の焦点距離
Ｋｆ：フォーカス群のフォーカス敏感度であり、（参考式ａ）で表される量
Ｆｂ：フォーカス群以降のレンズ系の焦点距離
βｂｆ：フォーカス群以降のレンズ系の横倍率
θ：最大光線高の主光線の光軸を基準とした像面に入射する角度
ｙ：最大像高
The coefficient Kw can be approximately expressed by the following (reference formula b).
(Reference Formula b) Kw = (βf / Ff · Kf) − (Fb · βbf) ^ − 1− (tan θ / y)
βf: lateral magnification of the focus group Ff: focal length of the focus group Kf: focus sensitivity of the focus group, amount Fb: focal length of the lens system after the focus group βbf: focus group Lateral magnification θ of the lens system thereafter: Angle incident on the image plane with reference to the optical axis of the principal ray at the maximum ray height y: Maximum image height
（参考式ｂ）より、係数Ｋｗとフォーカス群の横倍率βｆは比例関係にあることがわかる。従って、フォーカス群の横倍率βｆが大きくなると、係数Ｋｗも大きくなるため、前述の通り、ウォブリング時の像高変化率は増大してしまう。そのため、ウォブリング時の像高変化率を小さくするには、フォーカス群の横倍率βｆを小さくする必要がある。 (Reference formula b) shows that the coefficient Kw and the lateral magnification βf of the focus group are in a proportional relationship. Accordingly, when the lateral magnification βf of the focus group is increased, the coefficient Kw is also increased, so that the image height change rate during wobbling increases as described above. Therefore, in order to reduce the image height change rate during wobbling, it is necessary to reduce the lateral magnification βf of the focus group.
条件式（１）で規定したフォーカス敏感度を確保しつつ、条件式（２）の上限値を超え、第３レンズ群Ｌ３の横倍率が大きくなると、フォーカス群である第３レンズ群Ｌ３の倍率負担が大きくなるため、（参考式ｂ）の関係式より、ウォブリング時の像高変化率が大きくなる。 If the upper limit of conditional expression (2) is exceeded and the lateral magnification of the third lens unit L3 increases while securing the focus sensitivity defined by conditional expression (1), the magnification of the third lens unit L3 that is the focus group Since the burden increases, the image height change rate during wobbling increases from the relational expression (reference formula b).
条件式（１）で規定したフォーカス敏感度を確保しつつ、条件式（２）の下限値を超え、第３レンズ群Ｌ３の横倍率が小さくなると、フォーカス群である第３レンズ群Ｌ３の倍率負担が小さくなるため、ウォブリング時の像高変化率は小さくなるが、第３レンズ群Ｌ３以降での倍率負担が大きくなり、屈折力が大きくなるため、製造誤差による性能劣化が増大し、これを良好に補正することが困難となる。 If the lower limit of the conditional expression (2) is exceeded and the lateral magnification of the third lens unit L3 is reduced while securing the focus sensitivity defined by the conditional expression (1), the magnification of the third lens unit L3 that is the focus group is reduced. Since the burden is reduced, the image height change rate during wobbling is reduced, but the magnification burden after the third lens unit L3 is increased, and the refractive power is increased. It becomes difficult to correct well.
なお、上述した条件式（２）について、その下限値は２．７０に、また上限値をさらに１０．１２に規定することで、前述の効果をより確実にすることができる。 In the above-described conditional expression (2), the lower limit value is specified to 2.70, and the upper limit value is further specified to 10.12, whereby the above-described effect can be further ensured.
また、本発明の防振機能を有する望遠ズームレンズは、前記第５レンズ群Ｌ５は、物体側から像側へ順に、正の屈折力を有する第５ａレンズ成分Ｌ５ａと、負の屈折力を有する第５ｂレンズ成分Ｌ５ｂと、正の屈折力を有する第５ｃレンズ成分Ｌ５ｃと、から成り、前記第５ｂレンズ成分Ｌ５ｂを光軸に対して略垂直方向に移動させることで像を光軸に対して垂直方向に移動することが可能であり、以下の条件式を満足することを特徴とする。
０．３９＜｜βｂ５ｂ・（１−β５ｂ）｜＜２．３４ （３）
β５ｂ：前記レンズ成分Ｌ５ｂの物体距離無限遠での横倍率
βｂ５ｂ：前記レンズ成分Ｌ５ｂより像側に位置するレンズ系の物体距離無限遠での横倍率
In the telephoto zoom lens having an image stabilization function according to the present invention, the fifth lens unit L5 has a negative refractive power and a fifth-a lens component L5a having a positive refractive power in order from the object side to the image side. A fifth-b lens component L5b and a fifth-c lens component L5c having a positive refractive power, and moving the fifth-b lens component L5b in a direction substantially perpendicular to the optical axis to thereby shift the image relative to the optical axis. It can move in the vertical direction and satisfies the following conditional expression.
0.39 <| βb5b · (1-β5b) | <2.34 (3)
β5b: lateral magnification of the lens component L5b at infinite object distance βb5b: lateral magnification of the lens system positioned on the image side from the lens component L5b at infinite object distance
条件式（３）は防振群の最適な移動量を決定するために、防振群の防振係数を規定したものである。 Conditional expression (3) defines an anti-vibration coefficient of the anti-vibration group in order to determine an optimum movement amount of the anti-vibration group.
防振係数ｋｏｓは防振群の移動量Δｘに対する像面での像ブレ補正量Δｙの比であり、以下の（参考式ｃ）で表すことができる。
（参考式ｃ） ｋｏｓ＝Δｙ／Δｘ＝βｂｏｓ×（１−βｏｓ）
ｋｏｓ：防振係数
Δｙ：像面での像ブレ補正量
Δｘ：防振群の移動量
βｂｏｓ：防止群以降のレンズ系の横倍率
βｏｓ：防振群の横倍率
The image stabilization coefficient kos is a ratio of the image blur correction amount Δy on the image plane to the movement amount Δx of the image stabilization group, and can be expressed by the following (reference formula c).
(Reference formula c) kos = Δy / Δx = βbos × (1−βos)
kos: image stabilization coefficient Δy: image blur correction amount on the image plane Δx: movement amount of the image stabilization group βbos: lateral magnification of the lens system after the image stabilization group βos: lateral magnification of the image stabilization group
（参考式ｃ）から、防振群の横倍率βｏｓが等倍から離れると、防振係数ｋｏｓは大きくなることがわかる。防振係数ｋｏｓが大きくなることで、同じ像ブレ補正量Δｙに対して、防振群の移動量Δｘを小さくできるため、移動量Δｘを小さくした分、防振ユニット径を小さくでき、製品径の小型化に有利になる。 From (reference formula c), it can be seen that the anti-vibration coefficient kos increases as the lateral magnification βos of the anti-vibration group departs from equal magnification. By increasing the image stabilization coefficient kos, it is possible to reduce the movement amount Δx of the image stabilization group with respect to the same image blur correction amount Δy. This is advantageous for downsizing.
条件式（３）の上限値を超え、防振係数が大きくなると、前述のとおり、小型化には有利になるが、防振時の偏芯コマ収差や倍率色収差変動が大きくなり、これを良好に補正することが困難となる。 If the upper limit of conditional expression (3) is exceeded and the image stabilization coefficient increases, as described above, it is advantageous for downsizing, but the eccentric coma and lateral chromatic aberration fluctuations during image stabilization increase, and this is good. It will be difficult to correct it.
条件式（３）の下限値を超え、防振係数が小さくなると、防振時の収差変動は抑えやすくなるが、防振群の移動量が大きくなるため、防振ユニット径が増大し、製品径の小型化が困難となる。 If the lower limit of conditional expression (3) is exceeded and the image stabilization coefficient becomes smaller, it will be easier to suppress aberration fluctuations during image stabilization, but the amount of movement of the image stabilization group will increase, resulting in an increase in the image stabilization unit diameter and product. It becomes difficult to reduce the diameter.
なお、上述した条件式（３）について、その下限値は０．４６に、また上限値をさらに２．００に規定することで、前述の効果をより確実にすることができる。 In the above-mentioned conditional expression (3), the lower limit value is set to 0.46 and the upper limit value is further set to 2.00, so that the above-described effect can be further ensured.
また、本発明の防振機能を有する望遠ズームレンズは、以下の条件式を満足することを特徴とする。
０．４９＜｜β２ｔ｜＜１．２６ （４）
β２ｔ：前記第２レンズ群Ｌ２の望遠端における物体距離無限遠での横倍率
In addition, a telephoto zoom lens having an image stabilization function according to the present invention satisfies the following conditional expression.
0.49 <| β2t | <1.26 (4)
β2t: lateral magnification at infinite object distance at the telephoto end of the second lens unit L2
条件式（４）は、小型化と高性能化を両立させるために、第２レンズ群Ｌ２の望遠端での横倍率を規定したものである。 Conditional expression (4) defines the lateral magnification at the telephoto end of the second lens unit L2 in order to achieve both miniaturization and high performance.
条件式（４）の下限値を超え、第２レンズ群Ｌ２の横倍率が小さくなると、ズーミング時の移動量が増加し、レンズ全系の全長が増大してしまい、小型化が困難となる。 If the lower limit of conditional expression (4) is exceeded and the lateral magnification of the second lens unit L2 is reduced, the amount of movement during zooming increases, the overall length of the entire lens system increases, and it becomes difficult to reduce the size.
条件式（４）の上限値を超え、第２レンズ群Ｌ２の横倍率が大きくなると、望遠端において、第１レンズ群で発生する収差、特に、軸上色収差、球面収差が、第２レンズ群Ｌ２によって、より拡大されることとなる。このため、この第２レンズ群で拡大された収差を補正するために、第２レンズ群以降の群でこの収差を打ち消すよう収差を発生させる必要があるため、特に、望遠端での高性能化がより困難となる。 When the upper limit of conditional expression (4) is exceeded and the lateral magnification of the second lens unit L2 is increased, aberrations generated in the first lens unit, particularly axial chromatic aberration and spherical aberration, at the telephoto end are caused by the second lens unit. It will be further enlarged by L2. For this reason, in order to correct the aberration magnified by the second lens group, it is necessary to generate aberration so as to cancel this aberration in the second lens group and subsequent groups. Becomes more difficult.
なお、上述した条件式（４）について、その下限値は０．５８に、また上限値をさらに１．２４に規定することで、前述の効果をより確実にすることができる。 In the above-described conditional expression (4), the lower limit value is set to 0.58, and the upper limit value is further set to 1.24, whereby the above-described effect can be further ensured.
また、前記第４レンズ群Ｌ４は、物体側から像側へ順に、正の屈折力を有するレンズ成分Ｌ４ｆと、物体側の面が物体面に対して凹面である負の屈折力を有するレンズ成分Ｌ４ｒとから成る、若しくは、物体側から像側へ順に、凸レンズと凹レンズの接合から成る、ことが好ましい。 The fourth lens unit L4 includes, in order from the object side to the image side, a lens component L4f having a positive refractive power, and a lens component having a negative refractive power in which the object side surface is concave with respect to the object surface. Preferably, it is composed of L4r, or is composed of a cemented convex lens and concave lens in order from the object side to the image side.
前記第４レンズ群Ｌ４を前述のような構成にすることで、正の屈折力を有するレンズ成分と、負の屈折力を有する成分の間で球面収差や軸上色収差が相殺されるため、特に望遠端側でより効果的に、第４レンズ群Ｌ４全体で発生する球面収差や軸上色収差を抑えることができる。 Since the fourth lens unit L4 is configured as described above, spherical aberration and axial chromatic aberration are offset between a lens component having a positive refractive power and a component having a negative refractive power. Spherical aberration and axial chromatic aberration occurring in the entire fourth lens unit L4 can be suppressed more effectively on the telephoto end side.
また、本発明の防振機能を有する望遠ズームレンズは、以下の条件式で規定したズーム比を満足することが好ましい。
２．４＜ｆｔ／ｆｗ＜３．８ （５）
ｆｔ：望遠端における物体距離無限遠でのレンズ全系の焦点距離
ｆｗ：広角端における物体距離無限遠でのレンズ全系の焦点距離
In addition, it is preferable that the telephoto zoom lens having the image stabilization function of the present invention satisfies the zoom ratio defined by the following conditional expression.
2.4 <ft / fw <3.8 (5)
ft: focal length of the entire lens system at infinity at the telephoto end fw: focal length of the entire lens system at infinity at the wide angle end
条件式（５）は、ズーム比を規定したものである。 Conditional expression (5) defines the zoom ratio.
条件式（５）の下限値を下回ると、所望のズーム比を得られなくなる。上限値を超え、ズーム比が大きくなると、変倍系の倍率負担が大きくなり、所望の光学性能が得られなくなるだけでなく、変倍系前後のズーム間隔の増大にもつながるため、光学系全体の大型化を招いてしまう。 If the lower limit of conditional expression (5) is not reached, a desired zoom ratio cannot be obtained. If the upper limit is exceeded and the zoom ratio increases, the magnification burden on the zoom system increases, which not only prevents the desired optical performance from being obtained, but also increases the zoom interval before and after the zoom system. Will lead to an increase in size.
なお、上述した条件式（５）について、その下限値は２．６０に、また上限値をさらに３．５０に規定することで、前述の効果をより確実にすることができる。 In the above-described conditional expression (5), the above-mentioned effect can be further ensured by defining the lower limit value to 2.60 and the upper limit value to 3.50.
以下、数値実施例に係る防振機能を有する望遠ズームレンズに係る実施例１乃至７の数値データを示す。 Hereinafter, numerical data of Examples 1 to 7 related to the telephoto zoom lens having the image stabilization function according to the numerical example will be shown.
［面データ］において、面番号は物体側から数えたレンズ面又は開口絞りの番号、ｒは各面の曲率半径、ｄは各面の間隔、ｎｄはｄ線（波長λ＝５８７．５６ｎｍ）に対する屈折率、νｄはｄ線に対するアッベ数を示す。またＢＦはバックフォーカスを表す。 In [Surface Data], the surface number is the number of the lens surface or aperture stop counted from the object side, r is the radius of curvature of each surface, d is the distance between the surfaces, and nd is for the d-line (wavelength λ = 587.56 nm). The refractive index, νd, indicates the Abbe number with respect to the d line. BF represents back focus.
面番号を付した（絞り）には、平面または開口絞りに対する曲率半径∞（無限大）を記入している。 In the surface number (diaphragm), the radius of curvature ∞ (infinite) with respect to the plane or aperture stop is entered.
［各種データ］には、各焦点距離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 the focal length in each focal length state.
［可変間隔データ］には、各焦点距離状態における可変間隔及びＢＦ（バックフォーカス）の値を示している。 [Variable interval data] indicates the value of the variable interval and BF (back focus) in each focal length 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及び群全体の合成焦点距離を示している。 [Lens Group Data] indicates the surface number of the most object side constituting each lens group and the combined focal length of the entire group.
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無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を得られるので、これに限るものではない。 In all of the following values, the focal length f, the radius of curvature r, the lens surface distance d, and other length units are expressed in millimeters (mm) unless otherwise specified. In the system, the same optical performance can be obtained even in proportional enlargement and proportional reduction, and the present invention is not limited to this.
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、ΔＳ、ΔＭ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 the aberration diagrams corresponding to each example, d, g, and C represent d-line, g-line, and C-line, respectively, and ΔS and ΔM represent sagittal image plane and meridional image plane, respectively.
さらに図１、１２、２３、３４、４５，５６、６７に示すレンズ構成図において、Ｉは像面、ＬＰＦはローパスフィルター、中心を通る一点鎖線は光軸である。 Further, in the lens configuration diagrams shown in FIGS. 1, 12, 23, 34, 45, 56, and 67, I is an image plane, LPF is a low-pass filter, and an alternate long and short dash line passing through the center is an optical axis.
以下に、各実施例に係る防振機能を有する望遠ズームレンズの諸元値を示す。［面データ］において、第１列は物体側から数えたレンズ面の順番、第２列のｒはレンズ面の曲率半径、第３列ｄはレンズ面間隔、第４列ｎｄはｄ線（波長λ＝５８７．５６ｎｍ）での屈折率、第５列νｄはｄ線（波長λ＝５８７．５６ｎｍ）でのアッベ数を表す。またｒ＝∞は平面を表し、（ＢＦ）はバックフォーカス、（絞り）は絞り面を示し、空気の屈折率ｎ＝１．００００はその記載を省略する。 The specification values of the telephoto zoom lens having the image stabilization function according to each example are shown below. In [Surface data], the first column is the order of the lens surfaces counted from the object side, the second column r is the radius of curvature of the lens surface, the third column d is the lens surface interval, and the fourth column nd is the d line (wavelength). The refractive index at λ = 587.56 nm), the fifth column νd represents the Abbe number at the d-line (wavelength λ = 587.56 nm). R = ∞ represents a plane, (BF) represents a back focus, (aperture) represents a diaphragm surface, and the refractive index of air n = 1.0000 is omitted.
図１は実施例１に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 1 is a lens configuration diagram of a telephoto zoom lens having an image stabilization function according to Example 1 when focused at infinity at the wide-angle end.
図１の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the image stabilization function shown in FIG. 1 includes a first lens unit L1 having a positive refractive power fixed to the image plane during zooming from the wide-angle end to the telephoto end in order from the object side to the image side. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズとで構成される。 In order from the object side to the image side, the first lens unit L1 includes a concave meniscus lens having a convex surface facing the object side, a biconvex lens, a convex meniscus lens having a convex surface facing the object side, and a convex surface having a convex surface facing the object side. It consists of a meniscus lens.
第２レンズ群Ｌ２は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとで構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a biconvex lens and a biconcave lens, a cemented lens of a biconcave lens, a convex meniscus lens having a convex surface facing the object side, and a biconcave lens. .
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、両凸レンズと両凹レンズの接合レンズとで構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens and a cemented lens of a biconvex lens and a biconcave lens.
第４レンズ群Ｌ４は、物体側から像側へ順に、両凸レンズと、両凹レンズとで構成される。 The fourth lens unit L4 includes a biconvex lens and a biconcave lens in order from the object side to the image side.
第５レンズ群Ｌ５は、物体側から像側へ順に、両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、それぞれ物体側に凸面を向けた凹メニスカスレンズと凸メニスカスレンズの接合レンズとから構成されるレンズ成分Ｌ５ａと、両凸レンズと両凹レンズの接合レンズと、両凹レンズとから構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズと、物体側に凹面を向けた凸メニスカスレンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a biconvex lens, a convex meniscus lens having a convex surface directed toward the object side, and a cemented lens of a concave meniscus lens and a convex meniscus lens having a convex surface directed toward the object side. A lens component L5a, a cemented lens of a biconvex lens and a biconcave lens, and a biconcave lens, and a lens component L5b that performs image stabilization by moving in a direction substantially perpendicular to the optical axis, a biconvex lens, The lens component L5c includes a convex lens, a concave meniscus lens having a concave surface facing the object side, and a convex meniscus lens having a concave surface facing the object side.
続いて、以下に実施例１に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of the telephoto zoom lens having the image stabilization function according to Example 1 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 320.9564 2.5001 1.701540 41.15
2 92.9685 1.0166
3 90.5436 10.4875 1.437000 95.10
4 -517.3094 0.0999
5 131.2148 5.9059 1.437000 95.10
6 1765.7095 0.1000
7 80.8598 8.2818 1.437000 95.10
8 719.6553 d8
9 571.9791 5.0019 1.910820 35.25
10 -59.6976 1.5000 1.729160 54.67
11 54.0233 3.7874
12 -7920.8413 1.5000 1.620410 60.34
13 37.6933 4.0201 1.846660 23.78
14 90.0809 4.6647
15 -50.4877 1.5000 1.834810 42.72
16 175.1500 d16
17 241.2259 4.6801 1.772500 49.62
18 -74.5200 0.1000
19 117.7652 3.4988 1.806100 40.73
20 -2751.8787 1.5000 1.846660 23.78
21 100.4374 d21
22 78.8269 4.2005 1.806100 33.27
23 -297.0148 1.9658
24 -69.1862 1.5000 1.806100 33.27
25 1850.1920 d25
(絞り) ∞ 3.3664
27 54.0807 6.4015 1.729160 54.67
28 -1399.4113 0.7435
29 40.6750 5.2672 1.437000 95.10
30 228.6055 0.6343
31 136.7370 1.5000 1.806100 33.27
32 25.9552 7.6955 1.437000 95.10
33 234.7050 2.2245
34 78.7634 3.1011 1.805180 25.46
35 -324.4353 0.9500 1.516800 64.20
36 33.5942 3.9793
37 -119.6508 0.9500 1.698950 30.05
38 92.9496 2.2413
39 97.0844 4.2678 1.593490 67.00
40 -100.1899 0.2000
41 85.2607 4.2090 1.437000 95.10
42 -279.0081 5.8541
43 -33.2997 1.6439 1.785900 43.93
44 -132.4959 3.8427
45 -13541.2201 5.1314 1.805180 25.46
46 -61.9423 53.5495
47 ∞ 1.4500 1.523014 58.59
48 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 2.67
広角 中間 望遠
焦点距離 72.41 118.50 193.38
Fナンバー 2.92 2.92 2.92
全画角2ω 33.58 20.51 12.56
像高Y 21.63 21.63 21.63
レンズ全長 250.00 250.00 250.00
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d8 2.4673 27.8533 45.4120
d16 17.2479 12.2565 2.1799
d21 12.7044 6.2139 11.3938
d25 29.5661 15.6620 3.0000
BF 1.0000 1.0000 1.0000
d0 2752.8634 5152.8018 7252.7468
d8 2.4673 27.8533 45.4120
d16 18.0844 13.3127 4.0895
d21 11.8678 5.1579 9.4841
d25 29.5661 15.6620 3.0000
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 121.41
L2 9 -27.86
L3 17 80.86
L4 22 723.14
L5 27 82.67
L5a 27 69.25
L5b 34 -58.16
L5C 39 70.35
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 320.9564 2.5001 1.701540 41.15
2 92.9685 1.0166
3 90.5436 10.4875 1.437000 95.10
4 -517.3094 0.0999
5 131.2148 5.9059 1.437000 95.10
6 1765.7095 0.1000
7 80.8598 8.2818 1.437000 95.10
8 719.6553 d8
9 571.9791 5.0019 1.910820 35.25
10 -59.6976 1.5000 1.729160 54.67
11 54.0233 3.7874
12 -7920.8413 1.5000 1.620410 60.34
13 37.6933 4.0201 1.846660 23.78
14 90.0809 4.6647
15 -50.4877 1.5000 1.834810 42.72
16 175.1500 d16
17 241.2259 4.6801 1.772500 49.62
18 -74.5200 0.1000
19 117.7652 3.4988 1.806100 40.73
20 -2751.8787 1.5000 1.846660 23.78
21 100.4374 d21
22 78.8269 4.2005 1.806100 33.27
23 -297.0148 1.9658
24 -69.1862 1.5000 1.806100 33.27
25 1850.1920 d25
(Aperture) ∞ 3.3664
27 54.0807 6.4015 1.729160 54.67
28 -1399.4113 0.7435
29 40.6750 5.2672 1.437000 95.10
30 228.6055 0.6343
31 136.7370 1.5000 1.806100 33.27
32 25.9552 7.6955 1.437000 95.10
33 234.7050 2.2245
34 78.7634 3.1011 1.805180 25.46
35 -324.4353 0.9500 1.516800 64.20
36 33.5942 3.9793
37 -119.6508 0.9500 1.698950 30.05
38 92.9496 2.2413
39 97.0844 4.2678 1.593490 67.00
40 -100.1899 0.2000
41 85.2607 4.2090 1.437000 95.10
42 -279.0081 5.8541
43 -33.2997 1.6439 1.785900 43.93
44 -132.4959 3.8427
45 -13541.2201 5.1314 1.805180 25.46
46 -61.9423 53.5495
47 ∞ 1.4500 1.523014 58.59
48 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 2.67
Wide angle Medium telephoto focal length 72.41 118.50 193.38
F number 2.92 2.92 2.92
Full angle of view 2ω 33.58 20.51 12.56
Image height Y 21.63 21.63 21.63
Total lens length 250.00 250.00 250.00
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d8 2.4673 27.8533 45.4120
d16 17.2479 12.2565 2.1799
d21 12.7044 6.2139 11.3938
d25 29.5661 15.6620 3.0000
BF 1.0000 1.0000 1.0000
d0 2752.8634 5152.8018 7252.7468
d8 2.4673 27.8533 45.4120
d16 18.0844 13.3127 4.0895
d21 11.8678 5.1579 9.4841
d25 29.5661 15.6620 3.0000
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 9 -27.86
L3 17 80.86
L4 22 723.14
L5 27 82.67
L5a 27 69.25
L5b 34 -58.16
L5C 39 70.35
図１２は実施例２に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 12 is a lens configuration diagram at the time of focusing on infinity at the wide-angle end of the telephoto zoom lens having the image stabilization function according to the second embodiment.
図１２の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the anti-vibration function in FIG. 12 includes a first lens unit L1 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end in order from the object side to the image side. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズとで構成される。 In order from the object side to the image side, the first lens unit L1 includes a concave meniscus lens having a convex surface facing the object side, a biconvex lens, a convex meniscus lens having a convex surface facing the object side, and a convex surface having a convex surface facing the object side. It consists of a meniscus lens.
第２レンズ群Ｌ２は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとで構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a biconvex lens and a biconcave lens, a cemented lens of a biconcave lens, a convex meniscus lens having a convex surface facing the object side, and a biconcave lens. .
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、それぞれ物体側に凸面を向けた凸メニスカスレンズと凹メニスカスレンズの接合レンズとから構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens, and a cemented lens of a convex meniscus lens and a concave meniscus lens each having a convex surface facing the object side.
第４レンズ群Ｌ４は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズから構成される。 The fourth lens unit L4 includes a cemented lens of a biconvex lens and a biconcave lens in order from the object side to the image side.
第５レンズ群Ｌ５は、物体側から像側へ順に、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズと、それぞれ物体側に凸面を向けた凹メニスカスレンズと凸メニスカスレンズの接合レンズとから構成されるレンズ成分Ｌ５ａと、物体側に凹面を向けた凸メニスカスレンズと両凹レンズの接合レンズと、物体側に凸面を向けた凹メニスカスレンズとから構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズと、両凸レンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a convex meniscus lens having a convex surface directed toward the object side, a convex meniscus lens having a convex surface directed toward the object side, and a concave meniscus lens having a convex surface directed toward the object side. And a lens component L5a composed of a cemented lens of a convex meniscus lens, a cemented lens of a convex meniscus lens having a concave surface facing the object side and a biconcave lens, and a concave meniscus lens having a convex surface facing the object side, It is composed of a lens component L5b that performs image stabilization by moving in a direction substantially perpendicular to the optical axis, a biconvex lens, a concave meniscus lens having a concave surface facing the object side, and a lens component L5c that is composed of a biconvex lens. The
続いて、以下に実施例２に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of the telephoto zoom lens having the image stabilization function according to Example 2 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 181.0491 2.5000 1.701540 41.15
2 73.6573 0.1500
3 72.5705 9.9823 1.437000 95.10
4 2114.1059 0.1000
5 91.7976 6.6779 1.437000 95.10
6 642.9812 0.1000
7 81.0829 7.5895 1.437000 95.10
8 1006.3342 d8
9 230.8788 5.3553 1.910820 35.25
10 -53.1657 1.0000 1.729160 54.67
11 38.5800 6.5365
12 -411.3711 1.0000 1.620410 60.34
13 40.4160 3.1857 1.846660 23.78
14 156.8529 3.0041
15 -37.4230 1.5000 1.834810 42.72
16 297.0089 d16
17 -1245.9744 2.8905 1.772500 49.62
18 -66.0719 0.1000
19 125.1214 3.0900 1.806100 40.73
20 -258.7242 0.9999 1.846660 23.78
21 140.2659 d21
22 78.3117 5.1313 1.761820 26.61
23 -34.4517 1.0000 1.846660 23.78
24 434.0933 d24
(絞り) ∞ 2.0000
26 35.8189 2.3683 1.729160 54.67
27 76.9171 0.6189
28 38.0003 5.7006 1.437000 95.10
29 532.4011 4.9729
30 71.9683 1.0000 1.806100 33.27
31 18.5755 4.4062 1.437000 95.10
32 95.8661 3.9984
33 -82.0551 2.6737 1.728250 28.32
34 -28.6996 0.9500 1.582670 46.42
35 117.4923 0.4774
36 113.5429 0.9500 1.568830 56.04
37 41.3415 2.4289
38 53.6270 3.5955 1.497000 81.61
39 -87.2530 6.0086
40 -23.4029 1.0000 1.785900 43.93
41 -33.6331 8.0659
42 120.1540 3.3931 1.805180 25.46
43 -206.7185 53.5506
44 ∞ 1.4500 1.523014 58.59
45 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 2.67
広角 中間 望遠
焦点距離 72.38 118.50 193.40
Fナンバー 4.07 4.07 4.07
全画角2ω 33.59 20.50 12.56
像高Y 21.63 21.63 21.63
レンズ全長 230.00 230.00 230.00
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d8 2.0000 25.1337 40.9887
d16 17.4710 12.8927 2.3244
d21 13.3592 5.8198 11.1856
d24 24.6685 13.6525 3.0000
BF 1.0000 1.0000 1.0000
d0 2752.8634 4549.9998 7252.7468
d8 2.0000 25.1337 40.9887
d16 18.2070 13.9837 4.2021
d21 12.6232 4.7288 9.3080
d25 24.6685 13.6525 3.0000
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 110.12
L2 9 -24.47
L3 17 86.39
L4 22 183.56
L5 26 99.94
L5a 26 83.64
L5b 33 -56.41
L5C 38 67.26
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 181.0491 2.5000 1.701540 41.15
2 73.6573 0.1500
3 72.5705 9.9823 1.437000 95.10
4 2114.1059 0.1000
5 91.7976 6.6779 1.437000 95.10
6 642.9812 0.1000
7 81.0829 7.5895 1.437000 95.10
8 1006.3342 d8
9 230.8788 5.3553 1.910820 35.25
10 -53.1657 1.0000 1.729160 54.67
11 38.5800 6.5365
12 -411.3711 1.0000 1.620410 60.34
13 40.4160 3.1857 1.846660 23.78
14 156.8529 3.0041
15 -37.4230 1.5000 1.834810 42.72
16 297.0089 d16
17 -1245.9744 2.8905 1.772500 49.62
18 -66.0719 0.1000
19 125.1214 3.0900 1.806100 40.73
20 -258.7242 0.9999 1.846660 23.78
21 140.2659 d21
22 78.3117 5.1313 1.761820 26.61
23 -34.4517 1.0000 1.846660 23.78
24 434.0933 d24
(Aperture) ∞ 2.0000
26 35.8189 2.3683 1.729160 54.67
27 76.9171 0.6189
28 38.0003 5.7006 1.437000 95.10
29 532.4011 4.9729
30 71.9683 1.0000 1.806100 33.27
31 18.5755 4.4062 1.437000 95.10
32 95.8661 3.9984
33 -82.0551 2.6737 1.728250 28.32
34 -28.6996 0.9500 1.582670 46.42
35 117.4923 0.4774
36 113.5429 0.9500 1.568830 56.04
37 41.3415 2.4289
38 53.6270 3.5955 1.497000 81.61
39 -87.2530 6.0086
40 -23.4029 1.0000 1.785900 43.93
41 -33.6331 8.0659
42 120.1540 3.3931 1.805180 25.46
43 -206.7185 53.5506
44 ∞ 1.4500 1.523014 58.59
45 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 2.67
Wide angle Medium telephoto focal length
F number 4.07 4.07 4.07
Full angle of view 2ω 33.59 20.50 12.56
Image height Y 21.63 21.63 21.63
Total lens length 230.00 230.00 230.00
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d8 2.0000 25.1337 40.9887
d16 17.4710 12.8927 2.3244
d21 13.3592 5.8198 11.1856
d24 24.6685 13.6525 3.0000
BF 1.0000 1.0000 1.0000
d0 2752.8634 4549.9998 7252.7468
d8 2.0000 25.1337 40.9887
d16 18.2070 13.9837 4.2021
d21 12.6232 4.7288 9.3080
d25 24.6685 13.6525 3.0000
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 9 -24.47
L3 17 86.39
L4 22 183.56
L5 26 99.94
L5a 26 83.64
L5b 33 -56.41
L5C 38 67.26
図２３は実施例３に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 23 is a lens configuration diagram at the time of focusing on infinity at the wide-angle end of the telephoto zoom lens having the image stabilization function according to Example 3.
図２３の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the image stabilization function shown in FIG. 23 includes a first lens unit L1 having a positive refractive power fixed to the image plane during zooming from the wide-angle end to the telephoto end in order from the object side to the image side. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズとで構成される。 In order from the object side to the image side, the first lens unit L1 includes a concave meniscus lens having a convex surface facing the object side, a biconvex lens, a convex meniscus lens having a convex surface facing the object side, and a convex surface having a convex surface facing the object side. It consists of a meniscus lens.
第２レンズ群Ｌ２は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとで構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a biconvex lens and a biconcave lens, a cemented lens of a biconcave lens, a convex meniscus lens having a convex surface facing the object side, and a biconcave lens. .
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、それぞれ物体側に凸面を向けた凸メニスカスレンズと凹メニスカスレンズの接合レンズとから構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens, and a cemented lens of a convex meniscus lens and a concave meniscus lens each having a convex surface facing the object side.
第４レンズ群Ｌ４は、物体側から像側へ順に、物体側に凸面を向けた凸メニスカスレンズと、両凹レンズとから構成される。 The fourth lens unit L4 includes, in order from the object side to the image side, a convex meniscus lens having a convex surface directed toward the object side, and a biconcave lens.
第５レンズ群Ｌ５は、物体側から像側へ順に、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズと、それぞれ物体側に凸面を向けた凹メニスカスレンズと凸メニスカスレンズの接合レンズから構成されるレンズ成分Ｌ５ａと、それぞれ物体側に凸面を向けた凸メニスカスレンズと凹メニスカスレンズの接合レンズと、両凹レンズとから構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズと、物体側に凹面を向けた凸メニスカスレンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。これを光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズと、物体側に凹面を向けた凸メニスカスレンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a convex meniscus lens having a convex surface directed toward the object side, a convex meniscus lens having a convex surface directed toward the object side, and a concave meniscus lens having a convex surface directed toward the object side. Lens component L5a composed of a cemented lens of a convex meniscus lens, a cemented lens of a convex meniscus lens and a concave meniscus lens having a convex surface facing the object side, and a biconcave lens, respectively, in a direction substantially perpendicular to the optical axis Consists of a lens component L5b that performs image stabilization by moving, a biconvex lens, a concave meniscus lens having a concave surface facing the object side, and a lens component L5c having a convex meniscus lens having a concave surface facing the object side. Is done. Consists of a lens component L5b that performs image stabilization by moving it in a direction substantially perpendicular to the optical axis, a biconvex lens, a concave meniscus lens with a concave surface facing the object side, and a convex meniscus lens with a concave surface facing the object side Lens component L5c.
続いて、以下に実施例３に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of the telephoto zoom lens having the image stabilization function according to Example 3 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 414.0354 2.5000 1.701540 41.15
2 96.4766 0.1500
3 92.3170 9.5805 1.437000 95.10
4 -393.6637 0.1000
5 109.1221 6.2350 1.437000 95.10
6 3221.0085 0.1000
7 80.2251 6.5742 1.437000 95.10
8 311.0597 d8
9 808.4336 4.3971 1.910820 35.25
10 -64.5536 1.0000 1.729160 54.67
11 53.9517 4.1323
12 -244.3868 1.0000 1.620410 60.34
13 40.8965 3.3057 1.846660 23.78
14 144.1541 2.2884
15 -71.0758 1.5000 1.834810 42.72
16 134.3294 d16
17 112.5850 3.4401 1.772500 49.62
18 -93.9150 0.1000
19 77.5507 1.9501 1.806100 40.73
20 226.2442 1.0000 1.846660 23.78
21 57.4805 d21
22 53.6877 3.0490 1.806100 33.27
23 11899.3671 1.2626
24 -69.8420 1.0000 1.806100 33.27
25 245.6061 d25
(絞り) ∞ 2.0000
27 34.3914 2.8978 1.729160 54.67
28 133.1315 2.7671
29 65.9761 3.0522 1.437000 95.10
30 545.5508 0.1000
31 48.9249 1.0000 1.806100 33.27
32 19.3198 5.3659 1.437000 95.10
33 1213.7485 1.9538
34 45.4127 2.8385 1.805180 25.46
35 403.0614 0.9688 1.487490 70.45
36 22.0304 3.3525
37 -66.2653 0.9500 1.723420 37.99
38 58.9504 1.6944
39 40.5205 4.2176 1.497000 81.61
40 -61.3546 4.8536
41 -21.7863 1.0000 1.804200 46.50
42 -32.9753 7.9450
43 -174.4093 2.9507 1.805180 25.46
44 -62.1356 52.0488
45 ∞ 1.4500 1.523014 58.59
46 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 2.67
広角 中間 望遠
焦点距離 72.38 118.50 193.40
Fナンバー 4.10 4.10 4.10
全画角2ω 33.59 20.53 12.56
像高Y 21.63 21.63 21.63
レンズ全長 225.00 225.00 225.00
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d8 2.9111 29.0080 46.4986
d16 22.2087 15.0650 1.8472
d21 13.9544 8.1650 14.4619
d25 26.8531 13.6893 3.1197
BF 1.0000 1.0000 1.0000
d0 2752.8634 5152.8018 7252.7468
d8 2.9111 29.0080 46.4986
d16 23.2359 16.4086 4.3207
d21 12.9272 6.8214 11.9883
d25 26.8531 13.6893 3.1197
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 121.81
L2 9 -31.13
L3 17 87.09
L4 22 1270.03
L5 27 82.99
L5a 27 52.30
L5b 34 -37.00
L5C 39 62.77
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 414.0354 2.5000 1.701540 41.15
2 96.4766 0.1500
3 92.3170 9.5805 1.437000 95.10
4 -393.6637 0.1000
5 109.1221 6.2350 1.437000 95.10
6 3221.0085 0.1000
7 80.2251 6.5742 1.437000 95.10
8 311.0597 d8
9 808.4336 4.3971 1.910820 35.25
10 -64.5536 1.0000 1.729160 54.67
11 53.9517 4.1323
12 -244.3868 1.0000 1.620410 60.34
13 40.8965 3.3057 1.846660 23.78
14 144.1541 2.2884
15 -71.0758 1.5000 1.834810 42.72
16 134.3294 d16
17 112.5850 3.4401 1.772500 49.62
18 -93.9150 0.1000
19 77.5507 1.9501 1.806100 40.73
20 226.2442 1.0000 1.846660 23.78
21 57.4805 d21
22 53.6877 3.0490 1.806100 33.27
23 11899.3671 1.2626
24 -69.8420 1.0000 1.806100 33.27
25 245.6061 d25
(Aperture) ∞ 2.0000
27 34.3914 2.8978 1.729160 54.67
28 133.1315 2.7671
29 65.9761 3.0522 1.437000 95.10
30 545.5508 0.1000
31 48.9249 1.0000 1.806100 33.27
32 19.3198 5.3659 1.437000 95.10
33 1213.7485 1.9538
34 45.4127 2.8385 1.805180 25.46
35 403.0614 0.9688 1.487490 70.45
36 22.0304 3.3525
37 -66.2653 0.9500 1.723420 37.99
38 58.9504 1.6944
39 40.5205 4.2176 1.497000 81.61
40 -61.3546 4.8536
41 -21.7863 1.0000 1.804200 46.50
42 -32.9753 7.9450
43 -174.4093 2.9507 1.805180 25.46
44 -62.1356 52.0488
45 ∞ 1.4500 1.523014 58.59
46 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 2.67
Wide angle Medium telephoto focal length 72.38 118.50 193.40
F number 4.10 4.10 4.10
Full angle of view 2ω 33.59 20.53 12.56
Image height Y 21.63 21.63 21.63
Total lens length 225.00 225.00 225.00
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d8 2.9111 29.0080 46.4986
d16 22.2087 15.0650 1.8472
d21 13.9544 8.1650 14.4619
d25 26.8531 13.6893 3.1197
BF 1.0000 1.0000 1.0000
d0 2752.8634 5152.8018 7252.7468
d8 2.9111 29.0080 46.4986
d16 23.2359 16.4086 4.3207
d21 12.9272 6.8214 11.9883
d25 26.8531 13.6893 3.1197
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 9 -31.13
L3 17 87.09
L4 22 1270.03
L5 27 82.99
L5a 27 52.30
L5b 34 -37.00
L5C 39 62.77
図３４は実施例４に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 34 is a lens configuration diagram of the telephoto zoom lens having the image stabilization function according to Example 4 when focused at infinity at the wide angle end.
図３４の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the image stabilization function shown in FIG. 34 includes, in order from the object side to the image side, a first lens unit L1 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズとで構成される。 In order from the object side to the image side, the first lens unit L1 includes a concave meniscus lens having a convex surface facing the object side, a biconvex lens, a convex meniscus lens having a convex surface facing the object side, and a convex surface having a convex surface facing the object side. It consists of a meniscus lens.
第２レンズ群Ｌ２は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとで構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a biconvex lens and a biconcave lens, a cemented lens of a biconcave lens, a convex meniscus lens having a convex surface facing the object side, and a biconcave lens. .
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、両凸レンズと両凹レンズの接合レンズとから構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens and a cemented lens of the biconvex lens and the biconcave lens.
第４レンズ群Ｌ４は、物体側から像側へ順に、両凸レンズと、両凹レンズとから構成される。 The fourth lens unit L4 includes a biconvex lens and a biconcave lens in order from the object side to the image side.
第５レンズ群Ｌ５は、物体側から像側へ順に、両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凹メニスカスレンズと両凸レンズの接合レンズとから構成されるレンズ成分Ｌ５ａと、物体側に凹面を向けた凸メニスカスレンズと両凹レンズの接合レンズと両凹レンズで構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズ、両凸レンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a biconvex lens, a convex meniscus lens having a convex surface facing the object side, a concave meniscus lens having a convex surface facing the object side, and a cemented lens of the biconvex lens. A lens component L5a, a convex meniscus lens having a concave surface facing the object side, a cemented lens of a biconcave lens, and a biconcave lens, and a lens component L5b that performs vibration isolation by moving in a direction substantially perpendicular to the optical axis. The lens component L5c includes a convex lens, a biconvex lens, a concave meniscus lens having a concave surface facing the object side, and a biconvex lens.
続いて、以下に実施例４に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of a telephoto zoom lens having an image stabilization function according to Example 4 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 292.7850 2.5000 1.701540 41.15
2 79.4410 0.1500
3 78.0664 11.4406 1.437000 95.10
4 -468.5825 0.1000
5 97.8156 7.3953 1.437000 95.10
6 2863.5618 0.1000
7 74.1194 9.1631 1.437000 95.10
8 767.6488 d8
9 399.1248 4.7375 1.910820 35.25
10 -44.7744 1.5000 1.729160 54.67
11 37.7014 3.5657
12 -1357.7876 1.5000 1.620410 60.34
13 30.1802 3.6366 1.846660 23.78
14 87.7882 3.7595
15 -33.5876 1.5000 1.834810 42.72
16 248.9224 d16
17 985.7739 3.6582 1.772500 49.62
18 -56.9618 0.1000
19 127.3017 3.8628 1.806100 40.73
20 -90.6993 1.5000 1.846660 23.78
21 222.5400 d21
22 79.3954 3.2315 1.806100 33.27
23 -199.3810 1.2128
24 -64.6628 1.5000 1.806100 33.27
25 462.1614 d25
(絞り) ∞ 2.0000
27 47.2818 4.6117 1.729160 54.67
28 -391.4784 0.1000
29 42.4742 4.0687 1.437000 95.10
30 1000.0000 1.0538
31 2720.4382 1.5000 1.806100 33.27
32 25.5348 5.2377 1.437000 95.10
33 -265.4720 3.2198
34 -125.2473 2.5071 1.805180 25.46
35 -42.0628 0.9500 1.516800 64.20
36 36.5645 2.3690
37 -122.1145 0.9500 1.698950 30.05
38 785.6236 2.2262
39 415.1531 2.5139 1.593490 67.00
40 -108.0688 0.2000
41 103.2590 4.0165 1.437000 95.10
42 -42.6358 1.4915
43 -33.0517 1.6269 1.785900 43.93
44 -75.3631 0.1500
45 123.5060 3.1269 1.805180 25.46
46 -185.8965 52.0499
47 ∞ 1.4500 1.523014 58.59
48 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 3.39
広角 中間 望遠
焦点距離 51.71 95.12 174.99
Fナンバー 2.92 2.92 2.92
全画角2ω 30.87 16.79 9.13
像高Y 14.20 14.20 14.20
レンズ全長 226.07 226.07 226.07
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d8 2.3760 28.2482 43.7201
d16 18.2194 12.9605 2.2396
d21 14.6240 5.9612 12.5740
d25 26.3144 14.3639 3.0000
BF 1.0000 1.0000 1.0000
d0 1965.5874 3679.1809 5178.5744
d8 2.3760 28.2482 43.7201
d16 18.8740 14.0197 4.6669
d21 13.9694 4.9020 10.1468
d25 26.3144 14.3639 3.0000
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 103.01
L2 9 -21.17
L3 17 60.07
L4 22 2399.70
L5 27 69.26
L5a 27 61.72
L5b 34 -48.40
L5C 39 53.81
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 292.7850 2.5000 1.701540 41.15
2 79.4410 0.1500
3 78.0664 11.4406 1.437000 95.10
4 -468.5825 0.1000
5 97.8156 7.3953 1.437000 95.10
6 2863.5618 0.1000
7 74.1194 9.1631 1.437000 95.10
8 767.6488 d8
9 399.1248 4.7375 1.910820 35.25
10 -44.7744 1.5000 1.729160 54.67
11 37.7014 3.5657
12 -1357.7876 1.5000 1.620410 60.34
13 30.1802 3.6366 1.846660 23.78
14 87.7882 3.7595
15 -33.5876 1.5000 1.834810 42.72
16 248.9224 d16
17 985.7739 3.6582 1.772500 49.62
18 -56.9618 0.1000
19 127.3017 3.8628 1.806100 40.73
20 -90.6993 1.5000 1.846660 23.78
21 222.5400 d21
22 79.3954 3.2315 1.806100 33.27
23 -199.3810 1.2128
24 -64.6628 1.5000 1.806100 33.27
25 462.1614 d25
(Aperture) ∞ 2.0000
27 47.2818 4.6117 1.729160 54.67
28 -391.4784 0.1000
29 42.4742 4.0687 1.437000 95.10
30 1000.0000 1.0538
31 2720.4382 1.5000 1.806100 33.27
32 25.5348 5.2377 1.437000 95.10
33 -265.4720 3.2198
34 -125.2473 2.5071 1.805180 25.46
35 -42.0628 0.9500 1.516800 64.20
36 36.5645 2.3690
37 -122.1145 0.9500 1.698950 30.05
38 785.6236 2.2262
39 415.1531 2.5139 1.593490 67.00
40 -108.0688 0.2000
41 103.2590 4.0165 1.437000 95.10
42 -42.6358 1.4915
43 -33.0517 1.6269 1.785900 43.93
44 -75.3631 0.1500
45 123.5060 3.1269 1.805180 25.46
46 -185.8965 52.0499
47 ∞ 1.4500 1.523014 58.59
48 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 3.39
Wide angle Medium Telephoto focal length 51.71 95.12 174.99
F number 2.92 2.92 2.92
Full angle 2ω 30.87 16.79 9.13
Image height Y 14.20 14.20 14.20
Total lens length 226.07 226.07 226.07
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d8 2.3760 28.2482 43.7201
d16 18.2194 12.9605 2.2396
d21 14.6240 5.9612 12.5740
d25 26.3144 14.3639 3.0000
BF 1.0000 1.0000 1.0000
d0 1965.5874 3679.1809 5178.5744
d8 2.3760 28.2482 43.7201
d16 18.8740 14.0197 4.6669
d21 13.9694 4.9020 10.1468
d25 26.3144 14.3639 3.0000
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 9 -21.17
L3 17 60.07
L4 22 2399.70
L5 27 69.26
L5a 27 61.72
L5b 34 -48.40
L5C 39 53.81
図４５は実施例５に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 45 is a lens configuration diagram of a telephoto zoom lens having an image stabilization function according to Example 5 when focusing at infinity at the wide-angle end.
図４５の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the image stabilization function shown in FIG. 45 includes a first lens unit L1 having a positive refractive power fixed to the image plane during zooming from the wide-angle end to the telephoto end in order from the object side to the image side. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズとで構成される。 In order from the object side to the image side, the first lens unit L1 includes a concave meniscus lens having a convex surface facing the object side, a biconvex lens, a convex meniscus lens having a convex surface facing the object side, and a convex surface having a convex surface facing the object side. It consists of a meniscus lens.
第２レンズ群Ｌ２は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとで構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a biconvex lens and a biconcave lens, a cemented lens of a biconcave lens, a convex meniscus lens having a convex surface facing the object side, and a biconcave lens. .
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、両凸レンズと物体側に凹面を向けた凹メニスカスレンズの接合レンズとから構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens, and a cemented lens of a biconvex lens and a concave meniscus lens having a concave surface facing the object side.
第４レンズ群Ｌ４は、物体側から像側へ順に、両凸レンズと、両凹レンズとから構成される。 The fourth lens unit L4 includes a biconvex lens and a biconcave lens in order from the object side to the image side.
第５レンズ群Ｌ５は、物体側から像側へ順に、両凸レンズと、物体側に凸面を向けた凸メニスカスレンズと、両凹レンズと両凸レンズの接合レンズとから構成されるレンズ成分Ｌ５ａと、物体側に凹面を向けた凸メニスカスレンズと両凹レンズの接合レンズと、物体側に凸面を向けた凹メニスカスレンズで構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、両凸レンズと物体側に凹面を向けた凹メニスカスレンズとの接合レンズと、両凸レンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a biconvex lens, a convex meniscus lens having a convex surface directed toward the object side, a lens component L5a including a cemented lens of the biconcave lens and the biconvex lens, A lens component L5b composed of a convex meniscus lens having a concave surface facing the side and a cemented lens of a biconcave lens and a concave meniscus lens having a convex surface facing the object side, and performing vibration isolation by moving in a direction substantially perpendicular to the optical axis; The lens component L5c includes a biconvex lens, a cemented lens of a biconvex lens and a concave meniscus lens having a concave surface facing the object side, and a biconvex lens.
続いて、以下に実施例５に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of the telephoto zoom lens having the image stabilization function according to Example 5 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 340.1475 2.5000 1.701540 41.15
2 80.0090 0.4305
3 78.9042 11.9252 1.437000 95.10
4 -370.3702 0.1000
5 95.9106 7.8574 1.437000 95.10
6 42992.8565 0.1000
7 72.6447 8.7118 1.437000 95.10
8 602.8157 d8
9 179.1826 5.0037 1.910820 35.25
10 -45.2679 1.5000 1.729160 54.67
11 36.5328 3.7179
12 -328.9453 1.5000 1.620410 60.34
13 33.6139 3.3858 1.846660 23.78
14 102.0903 3.6277
15 -32.6678 1.5000 1.834810 42.72
16 240.7956 d16
17 1321.3999 3.2248 1.772500 49.62
18 -66.3327 0.1000
19 244.1928 3.9377 1.806100 40.73
20 -63.6996 1.5000 1.846660 23.78
21 -1356.0458 d21
22 67.4538 3.5105 1.806100 33.27
23 -190.1368 0.9839
24 -70.5115 1.5000 1.806100 33.27
25 171.3354 d25
(絞り) ∞ 3.3095
27 61.4668 5.4848 1.729160 54.67
28 -117.0842 0.1000
29 40.2650 4.1408 1.437000 95.10
30 1000.0000 1.3020
31 -338.8538 1.5000 1.806100 33.27
32 27.3638 5.1461 1.437000 95.10
33 -146.9930 3.1756
34 -94.8536 2.4399 1.805180 25.46
35 -39.9122 0.9500 1.516800 64.20
36 38.7638 1.8921
37 4660.2216 0.9500 1.698950 30.05
38 113.0774 2.5498
39 254.5426 2.1866 1.593490 67.00
40 -417.1081 0.2000
41 145.1291 4.8341 1.437000 95.10
42 -27.2723 1.5000 1.785900 43.93
43 -72.8530 0.1500
44 103.1825 3.7989 1.805180 25.46
45 -151.3573 52.4479
46 ∞ 1.4500 1.523014 58.59
47 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 3.38
広角 中間 望遠
焦点距離 51.71 95.12 175.00
Fナンバー 2.92 2.92 2.92
全画角2ω 30.83 16.77 9.13
像高Y 14.20 14.20 14.20
レンズ全長 228.28 228.28 228.28
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d8 2.0203 27.1011 42.0012
d16 20.3194 14.3814 2.2687
d21 16.8305 6.4125 13.8843
d25 21.9841 13.2593 3.0000
BF 1.0000 1.0000 1.0000
d0 1965.5874 3679.1809 5178.5744
d8 2.0203 27.1011 42.0012
d16 21.0425 15.5659 5.0149
d21 16.1073 5.2280 11.1381
d25 21.9841 13.2593 3.0000
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 101.14
L2 9 -21.80
L3 17 64.55
L4 22 1653.48
L5 27 70.24
L5a 27 58.48
L5b 34 -47.62
L5C 39 57.03
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 340.1475 2.5000 1.701540 41.15
2 80.0090 0.4305
3 78.9042 11.9252 1.437000 95.10
4 -370.3702 0.1000
5 95.9106 7.8574 1.437000 95.10
6 42992.8565 0.1000
7 72.6447 8.7118 1.437000 95.10
8 602.8157 d8
9 179.1826 5.0037 1.910820 35.25
10 -45.2679 1.5000 1.729160 54.67
11 36.5328 3.7179
12 -328.9453 1.5000 1.620410 60.34
13 33.6139 3.3858 1.846660 23.78
14 102.0903 3.6277
15 -32.6678 1.5000 1.834810 42.72
16 240.7956 d16
17 1321.3999 3.2248 1.772500 49.62
18 -66.3327 0.1000
19 244.1928 3.9377 1.806100 40.73
20 -63.6996 1.5000 1.846660 23.78
21 -1356.0458 d21
22 67.4538 3.5105 1.806100 33.27
23 -190.1368 0.9839
24 -70.5115 1.5000 1.806100 33.27
25 171.3354 d25
(Aperture) ∞ 3.3095
27 61.4668 5.4848 1.729160 54.67
28 -117.0842 0.1000
29 40.2650 4.1408 1.437000 95.10
30 1000.0000 1.3020
31 -338.8538 1.5000 1.806100 33.27
32 27.3638 5.1461 1.437000 95.10
33 -146.9930 3.1756
34 -94.8536 2.4399 1.805180 25.46
35 -39.9122 0.9500 1.516800 64.20
36 38.7638 1.8921
37 4660.2216 0.9500 1.698950 30.05
38 113.0774 2.5498
39 254.5426 2.1866 1.593490 67.00
40 -417.1081 0.2000
41 145.1291 4.8341 1.437000 95.10
42 -27.2723 1.5000 1.785900 43.93
43 -72.8530 0.1500
44 103.1825 3.7989 1.805180 25.46
45 -151.3573 52.4479
46 ∞ 1.4500 1.523014 58.59
47 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 3.38
Wide angle Medium Telephoto focal length 51.71 95.12 175.00
F number 2.92 2.92 2.92
Full angle 2ω 30.83 16.77 9.13
Image height Y 14.20 14.20 14.20
Total lens length 228.28 228.28 228.28
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d8 2.0203 27.1011 42.0012
d16 20.3194 14.3814 2.2687
d21 16.8305 6.4125 13.8843
d25 21.9841 13.2593 3.0000
BF 1.0000 1.0000 1.0000
d0 1965.5874 3679.1809 5178.5744
d8 2.0203 27.1011 42.0012
d16 21.0425 15.5659 5.0149
d21 16.1073 5.2280 11.1381
d25 21.9841 13.2593 3.0000
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 9 -21.80
L3 17 64.55
L4 22 1653.48
L5 27 70.24
L5a 27 58.48
L5b 34 -47.62
L5C 39 57.03
図５６は実施例６に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 56 is a lens configuration diagram of the telephoto zoom lens having the image stabilization function according to Example 6 when focusing at infinity at the wide-angle end.
図５６の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the image stabilization function shown in FIG. 56 includes a first lens unit L1 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end in order from the object side to the image side. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと、両凸レンズと、物体側に凸面を向けた凸メニスカスレンズとから構成される。 The first lens unit L1 includes, in order from the object side to the image side, a concave meniscus lens having a convex surface facing the object side, a biconvex lens, and a convex meniscus lens having a convex surface facing the object side.
第２レンズ群Ｌ２は、物体側から像側へ順に、両凸レンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとで構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a biconvex lens and a biconcave lens, a cemented lens of a biconcave lens, a convex meniscus lens having a convex surface facing the object side, and a biconcave lens. .
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、両凸レンズと両凹レンズの接合レンズとから構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens and a cemented lens of the biconvex lens and the biconcave lens.
第４レンズ群Ｌ４は、物体側から像側へ順に、両凸レンズと、両凹レンズとから構成される。 The fourth lens unit L4 includes a biconvex lens and a biconcave lens in order from the object side to the image side.
第５レンズ群Ｌ５は、物体側から像側へ順に、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凸メニスカスレンズと、物体側に凸面を向けた凹メニスカスレンズと両凸レンズの接合レンズとから構成されるレンズ成分Ｌ５ａと、両凸レンズと両凹レンズの接合レンズと、物体側に凹面を向けた凹メニスカスレンズで構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズと、物体側に凹面を向けた凸メニスカスレンズとから構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a convex meniscus lens having a convex surface directed toward the object side, a convex meniscus lens having a convex surface directed toward the object side, and a concave meniscus lens having a convex surface directed toward the object side Consists of a lens component L5a composed of a cemented lens of a biconvex lens, a cemented lens of a biconvex lens and a biconcave lens, and a concave meniscus lens having a concave surface facing the object side, and is prevented by moving in a direction substantially perpendicular to the optical axis. The lens component L5b that performs vibration, a biconvex lens, a concave meniscus lens having a concave surface facing the object side, and a lens component L5c including a convex meniscus lens having a concave surface facing the object side are configured.
続いて、以下に実施例６に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of the telephoto zoom lens having the image stabilization function according to Example 6 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 55.8303 1.2500 1.883000 40.80
2 35.5503 0.1500
3 34.6137 6.2442 1.437000 95.10
4 -308.5105 0.1500
5 40.6103 4.1755 1.437000 95.10
6 530.3689 d6
7 313.5044 2.3048 1.903660 31.32
8 -29.3825 0.7500 1.697000 48.52
9 27.6595 2.9464
10 -72.9671 0.7500 1.743300 49.22
11 16.7698 2.1887 1.921190 23.96
12 51.5668 2.5280
13 -21.3834 0.7500 1.883000 40.80
14 149.1138 d14
15 341.6160 2.4943 1.772500 49.62
16 -26.5572 0.1000
17 116.7099 2.8203 1.806100 40.73
18 -27.8734 0.7500 1.846660 23.78
19 -456.5615 d19
20 53.1025 1.9887 1.800000 29.84
21 -93.7322 0.8965
22 -33.9353 0.7500 1.801000 34.97
23 4593.8274 d23
(絞り) ∞ 1.0000
25 25.0683 2.6762 1.743300 49.22
26 73.1270 0.1000
27 18.2519 3.2674 1.437000 95.10
28 1224.0524 1.2400
29 49.0297 0.7500 1.806100 33.27
30 11.2533 4.7129 1.437000 95.10
31 -111.5875 0.9439
32 58.6338 1.1644 1.805180 25.46
33 -201.5953 0.7000 1.516800 64.20
34 14.8753 2.2780
35 -27.9111 0.7000 1.698950 30.05
36 -92.0830 0.3775
37 44.1301 2.2883 1.593490 67.00
38 -40.1523 2.3051
39 -13.9588 0.7000 1.772500 49.62
40 -33.0660 3.1096
41 572.6889 2.3613 1.805180 25.46
42 -32.1104 25.2612
43 ∞ 1.4500 1.523014 58.59
44 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 2.67
広角 中間 望遠
焦点距離 36.20 59.25 96.69
Fナンバー 2.92 2.92 2.92
全画角2ω 33.43 20.48 12.57
像高Y 10.82 10.82 10.82
レンズ全長 125.25 125.25 125.25
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d6 1.2016 16.4691 26.8241
d14 5.1528 3.7044 1.1158
d19 6.5376 2.1104 3.4361
d23 19.9840 10.5921 1.5000
BF 1.0000 1.0000 1.0000
d0 1376.4317 2274.7506 3626.3734
d6 1.2016 16.4691 26.8241
d14 5.3751 4.0198 1.6056
d19 6.3153 1.7950 2.9463
d23 19.9840 10.5921 1.5000
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 67.38
L2 7 -11.36
L3 15 26.00
L4 20 1736.41
L5 25 43.59
L5a 25 30.54
L5b 32 -27.15
L5C 37 42.65
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 55.8303 1.2500 1.883000 40.80
2 35.5503 0.1500
3 34.6137 6.2442 1.437000 95.10
4 -308.5105 0.1500
5 40.6103 4.1755 1.437000 95.10
6 530.3689 d6
7 313.5044 2.3048 1.903660 31.32
8 -29.3825 0.7500 1.697000 48.52
9 27.6595 2.9464
10 -72.9671 0.7500 1.743300 49.22
11 16.7698 2.1887 1.921190 23.96
12 51.5668 2.5280
13 -21.3834 0.7500 1.883000 40.80
14 149.1138 d14
15 341.6160 2.4943 1.772500 49.62
16 -26.5572 0.1000
17 116.7099 2.8203 1.806100 40.73
18 -27.8734 0.7500 1.846660 23.78
19 -456.5615 d19
20 53.1025 1.9887 1.800000 29.84
21 -93.7322 0.8965
22 -33.9353 0.7500 1.801000 34.97
23 4593.8274 d23
(Aperture) ∞ 1.0000
25 25.0683 2.6762 1.743300 49.22
26 73.1270 0.1000
27 18.2519 3.2674 1.437000 95.10
28 1224.0524 1.2400
29 49.0297 0.7500 1.806100 33.27
30 11.2533 4.7129 1.437000 95.10
31 -111.5875 0.9439
32 58.6338 1.1644 1.805180 25.46
33 -201.5953 0.7000 1.516800 64.20
34 14.8753 2.2780
35 -27.9111 0.7000 1.698950 30.05
36 -92.0830 0.3775
37 44.1301 2.2883 1.593490 67.00
38 -40.1523 2.3051
39 -13.9588 0.7000 1.772500 49.62
40 -33.0660 3.1096
41 572.6889 2.3613 1.805180 25.46
42 -32.1104 25.2612
43 ∞ 1.4500 1.523014 58.59
44 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 2.67
Wide angle Medium Telephoto focal length
F number 2.92 2.92 2.92
Full angle of view 2ω 33.43 20.48 12.57
Image height Y 10.82 10.82 10.82
Total lens length 125.25 125.25 125.25
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d6 1.2016 16.4691 26.8241
d14 5.1528 3.7044 1.1158
d19 6.5376 2.1104 3.4361
d23 19.9840 10.5921 1.5000
BF 1.0000 1.0000 1.0000
d0 1376.4317 2274.7506 3626.3734
d6 1.2016 16.4691 26.8241
d14 5.3751 4.0198 1.6056
d19 6.3153 1.7950 2.9463
d23 19.9840 10.5921 1.5000
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 7 -11.36
L4 20 1736.41
L5 25 43.59
L5a 25 30.54
L5b 32 -27.15
図６７は実施例７に係る防振機能を有する望遠ズームレンズの広角端での無限遠合焦時におけるレンズ構成図である。 FIG. 67 is a lens configuration diagram of the telephoto zoom lens having the image stabilization function according to Example 7 when focusing at infinity at the wide angle end.
図６７の防振機能を有する望遠ズームレンズは、物体側から像側へ順に、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第１レンズ群Ｌ１と、負の屈折力を有する第２レンズ群Ｌ２と、フォーカス時に像面側へ移動する正の屈折力を有する第３レンズ群Ｌ３と、正の屈折力を有する第４レンズ群Ｌ４と、開口絞りＳと、広角端から望遠端へのズーミングの際に像面に対して固定の正の屈折力の第５レンズ群Ｌ５とから構成される。 The telephoto zoom lens having the image stabilization function shown in FIG. 67 includes a first lens unit L1 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end in order from the object side to the image side. A second lens unit L2 having a negative refractive power, a third lens unit L3 having a positive refractive power that moves toward the image plane during focusing, a fourth lens unit L4 having a positive refractive power, and an aperture stop S and a fifth lens unit L5 having a positive refractive power that is fixed with respect to the image plane during zooming from the wide-angle end to the telephoto end.
第１レンズ群Ｌ１は、物体側から像側へ順に、物体側に凸面を向けた凹メニスカスレンズと両凸レンズの接合レンズと、物体側に凸面を向けた凸メニスカスレンズとから構成される。 The first lens unit L1 includes, in order from the object side to the image side, a concave meniscus lens having a convex surface facing the object side, a cemented lens of a biconvex lens, and a convex meniscus lens having a convex surface facing the object side.
第２レンズ群Ｌ２は、物体側から像側へ順に、物体側に凹面を向けた凸メニスカスレンズと両凹レンズの接合レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズと、両凹レンズとから構成される。 The second lens unit L2 includes, in order from the object side to the image side, a cemented lens of a convex meniscus lens having a concave surface facing the object side and a biconcave lens, and a cemented lens of a biconcave lens and a convex meniscus lens having a convex surface facing the object side. And a biconcave lens.
第３レンズ群Ｌ３は、物体側から像側へ順に、両凸レンズと、それぞれ物体側に凸面を向けた凸メニスカスレンズと凹メニスカスレンズの接合レンズとから構成される。 The third lens unit L3 includes, in order from the object side to the image side, a biconvex lens, and a cemented lens of a convex meniscus lens and a concave meniscus lens each having a convex surface facing the object side.
第４レンズ群Ｌ４は、物体側から像側へ順に、両凸レンズと、両凹レンズとから構成される。 The fourth lens unit L4 includes a biconvex lens and a biconcave lens in order from the object side to the image side.
第５レンズ群Ｌ５は、物体側から像側へ順に、両凸レンズと、両凸レンズと、両凹レンズと物体側に凸面を向けた凸メニスカスレンズの接合レンズとから構成されるレンズ成分Ｌ５ａと、それぞれ物体側に凸面を向けた凹メニスカスレンズと凸メニスカスレンズの接合レンズで構成され、光軸と略垂直方向に動かすことで防振を行うレンズ成分Ｌ５ｂと、両凸レンズと、物体側に凹面を向けた凹メニスカスレンズと、両凸レンズで構成されるレンズ成分Ｌ５ｃ、とから構成される。 The fifth lens unit L5 includes, in order from the object side to the image side, a lens component L5a including a biconvex lens, a biconvex lens, and a cemented lens of a biconcave lens and a convex meniscus lens having a convex surface facing the object side. Consists of a cemented lens of a concave meniscus lens with a convex surface facing the object side and a convex meniscus lens, and a lens component L5b that performs image stabilization by moving in a direction substantially perpendicular to the optical axis, a biconvex lens, and a concave surface facing the object side A concave meniscus lens and a lens component L5c composed of a biconvex lens.
続いて、以下に実施例７に係る防振機能を有する望遠ズームレンズの諸元値を示す。 Subsequently, specification values of the telephoto zoom lens having the image stabilization function according to Example 7 are shown below.
単位：mm
[面データ]
面番号 r d nd vd
物面 ∞ (d0)
1 69.7941 1.2500 1.800000 29.84
2 44.7687 6.4937 1.497000 81.61
3 -282.9232 0.1500
4 41.6991 4.0253 1.437000 95.10
5 184.2210 d5
6 -1348.4626 2.3062 1.910820 35.25
7 -36.5727 0.7500 1.729160 54.67
8 37.8096 1.7490
9 -210.3183 0.7500 1.620410 60.34
10 19.8053 2.0015 1.846660 23.78
11 44.4384 2.0120
12 -52.8767 0.7500 1.834810 42.72
13 60.1590 d13
14 72.9940 2.5261 1.772500 49.62
15 -50.3472 0.1000
16 63.2856 1.2470 1.806100 40.73
17 102.9857 0.7500 1.846660 23.78
18 39.3676 d18
19 32.4895 2.1239 1.806100 33.27
20 -1009.0968 1.1185
21 -41.6313 0.7500 1.806100 33.27
22 152.3439 d22
(絞り) ∞ 1.0000
24 22.4180 3.5056 1.743300 49.22
25 -3984.9373 0.1000
26 22.7342 5.5666 1.437000 95.10
27 -214.5646 0.5105
28 -184.5826 0.8374 1.806100 33.27
29 10.8853 3.7729 1.437000 95.10
30 62.9863 1.6782
31 161.7934 0.8000 1.548140 45.82
32 19.5132 1.2370 1.921190 23.96
33 23.7007 1.7146
34 64.3208 2.0363 1.593490 67.00
35 -40.1523 2.2999
36 -14.3591 0.7000 1.720470 34.71
37 -39.2374 2.0857
38 2074.6722 2.3804 1.921190 23.96
39 -30.1983 26.9511
40 ∞ 1.4500 1.523014 58.59
41 ∞ (BF)
像面 ∞
[各種データ]
ズーム比 2.67
広角 中間 望遠
焦点距離 36.20 59.25 96.69
Fナンバー 2.92 2.92 2.91
全画角2ω 33.58 20.53 12.57
像高Y 10.82 10.82 10.82
レンズ全長 127.00 127.00 127.00
[可変間隔データ]
広角 中間 望遠
d0 ∞ ∞ ∞
d5 1.6368 15.7379 25.6087
d13 11.0561 7.9103 1.0835
d18 6.9891 4.3477 8.3285
d22 16.8388 8.5248 1.5000
BF 1.0000 1.0000 1.0000
d0 1397.9998 2262.9999 3663.0000
d5 1.6368 15.7379 25.6087
d13 11.7259 8.8709 2.6080
d18 6.3193 3.3871 6.8040
d22 16.8388 8.5248 1.5000
BF 1.0000 1.0000 1.0000
[レンズ群データ]
群 始面 焦点距離
L1 1 69.28
L2 6 -17.05
L3 14 54.46
L4 19 421.32
L5 24 41.18
L5a 24 44.93
L5b 31 -63.43
L5C 34 41.57
Unit: mm
[Surface data]
Surface number rd nd vd
Object ∞ (d0)
1 69.7941 1.2500 1.800000 29.84
2 44.7687 6.4937 1.497000 81.61
3 -282.9232 0.1500
4 41.6991 4.0253 1.437000 95.10
5 184.2210 d5
6 -1348.4626 2.3062 1.910820 35.25
7 -36.5727 0.7500 1.729160 54.67
8 37.8096 1.7490
9 -210.3183 0.7500 1.620410 60.34
10 19.8053 2.0015 1.846660 23.78
11 44.4384 2.0120
12 -52.8767 0.7500 1.834810 42.72
13 60.1590 d13
14 72.9940 2.5261 1.772500 49.62
15 -50.3472 0.1000
16 63.2856 1.2470 1.806100 40.73
17 102.9857 0.7500 1.846660 23.78
18 39.3676 d18
19 32.4895 2.1239 1.806100 33.27
20 -1009.0968 1.1185
21 -41.6313 0.7500 1.806100 33.27
22 152.3439 d22
(Aperture) ∞ 1.0000
24 22.4180 3.5056 1.743300 49.22
25 -3984.9373 0.1000
26 22.7342 5.5666 1.437000 95.10
27 -214.5646 0.5105
28 -184.5826 0.8374 1.806100 33.27
29 10.8853 3.7729 1.437000 95.10
30 62.9863 1.6782
31 161.7934 0.8000 1.548140 45.82
32 19.5132 1.2370 1.921190 23.96
33 23.7007 1.7146
34 64.3208 2.0363 1.593490 67.00
35 -40.1523 2.2999
36 -14.3591 0.7000 1.720470 34.71
37 -39.2374 2.0857
38 2074.6722 2.3804 1.921190 23.96
39 -30.1983 26.9511
40 ∞ 1.4500 1.523014 58.59
41 ∞ (BF)
Image plane ∞
[Various data]
Zoom ratio 2.67
Wide angle Medium Telephoto focal length 36.20 59.25 96.69
F number 2.92 2.92 2.91
Full angle of view 2ω 33.58 20.53 12.57
Image height Y 10.82 10.82 10.82
Total lens length 127.00 127.00 127.00
[Variable interval data]
Wide angle Medium telephoto
d0 ∞ ∞ ∞
d5 1.6368 15.7379 25.6087
d13 11.0561 7.9103 1.0835
d18 6.9891 4.3477 8.3285
d22 16.8388 8.5248 1.5000
BF 1.0000 1.0000 1.0000
d0 1397.9998 2262.9999 3663.0000
d5 1.6368 15.7379 25.6087
d13 11.7259 8.8709 2.6080
d18 6.3193 3.3871 6.8040
d22 16.8388 8.5248 1.5000
BF 1.0000 1.0000 1.0000
[Lens group data]
Group Start surface Focal length
L2 6 -17.05
L4 19 421.32
L5 24 41.18
L5a 24 44.93
L5b 31 -63.43
L5C 34 41.57
また、これらの各実施例における条件式の対応値の一覧を示す。 In addition, a list of corresponding values of the conditional expressions in each of these examples is shown.
[条件式対応値]
条件式／実施例 1 2 3 4 5 6 7
(1)1.21＜|βb3t^2・(β3t^2-1)|＜6.50 2.56 2.60 1.97 2.23 1.97 5.00 1.57
(2)2.60＜|β3t|＜11.95 3.94 2.83 4.89 7.18 6.90 9.20 3.17
(3)0.39＜|βb5b・(1-β5b)|＜2.34 1.20 1.19 1.80 1.20 1.20 1.20 0.51
(4)0.49＜|β2t|＜1.26 0.96 1.02 1.10 1.13 1.22 0.64 1.06
(5)2.4＜ft/fw＜3.8 2.7 2.7 2.7 3.4 3.4 2.7 2.7
[Values for conditional expressions]
Conditional expression / Example 1 2 3 4 5 6 7
(1) 1.21 <| βb3t ^ 2 ・ (β3t ^ 2-1) | <6.50 2.56 2.60 1.97 2.23 1.97 5.00 1.57
(2) 2.60 <| β3t | <11.95 3.94 2.83 4.89 7.18 6.90 9.20 3.17
(3) 0.39 <| βb5b ・ (1-β5b) | <2.34 1.20 1.19 1.80 1.20 1.20 1.20 0.51
(4) 0.49 <| β2t | <1.26 0.96 1.02 1.10 1.13 1.22 0.64 1.06
(5) 2.4 <ft / fw <3.8 2.7 2.7 2.7 3.4 3.4 2.7 2.7
Ｌ１ 第１レンズ群
Ｌ２ 第２レンズ群
Ｌ３ 第３レンズ群
Ｌ４ 第４レンズ群
Ｌ５ 第５レンズ群
Ｓ 絞り
ＬＰＦ ローパスフィルター
Ｉ 像面
L1 1st lens group L2 2nd lens group L3 3rd lens group L4 4th lens group L5 5th lens group S Aperture LPF Low pass filter I Image plane
Claims (4)
広角側から望遠側のズーミングにおいて、前記第１レンズ群Ｌ１と、前記第５レンズ群Ｌ５は像面に対して固定であり、物体距離無限遠から近距離へのフォーカシングに際しては、前記第３レンズ群Ｌ３が光軸に沿って像側へ移動し、前記第５レンズ群Ｌ５内の一部を略垂直方向に移動させることで像を光軸に対して垂直方向に移動することが可能であり、以下の条件式を満足することを特徴とする防振機能を有する望遠ズームレンズ。
１．２１＜｜βｂ３ｔ＾２・（β３ｔ＾２−１）｜＜６．５０ （１）
β３ｔ：前記第３レンズ群Ｌ３の望遠端における物体距離無限遠での横倍率
βｂ３ｔ：前記第３レンズ群Ｌ３より像側に位置するレンズ系の望遠端における物体距離 In order from the object side to the image side, a first lens unit L1 having positive refractive power, a second lens unit L2 having negative refractive power, a third lens unit L3 having positive refractive power, and positive refraction A fourth lens unit L4 having a power, and a fifth lens unit L5 having a positive refractive power,
In zooming from the wide-angle side to the telephoto side, the first lens unit L1 and the fifth lens unit L5 are fixed with respect to the image plane, and the third lens unit is used for focusing from infinity to a short distance. L3 is moved to the image side along the optical axis state, and are able to move vertically the image with respect to the optical axis by moving substantially vertically a portion of said fifth lens unit L5 , telephoto zoom lens with a vibration reduction function characterized that you satisfy the following condition.
1.21 <| βb3t ^ 2 · (β3t ^ 2-1) | <6.50 (1)
β3t: lateral magnification at infinite object distance at the telephoto end of the third lens unit L3
βb3t: Object distance at the telephoto end of the lens system located on the image side from the third lens unit L3
ズームレンズ。
２．６０＜｜β３ｔ｜＜１１．９５ （２） The telephoto zoom lens having an image stabilization function according to claim 1 , wherein the following conditional expression is satisfied.
2.60 <| β3t | <11.95 (2)
０．３９＜｜βｂ５ｂ・（１−β５ｂ）｜＜２．３４ （３）
β５ｂ：前記レンズ成分Ｌ５ｂの物体距離無限遠での横倍率
βｂ５ｂ：前記レンズ成分Ｌ５ｂより像側に位置するレンズ系の物体距離無限遠での横倍率 The fifth lens unit L5 includes, in order from the object side to the image side, a 5a lens component L5a having a positive refractive power, a 5b lens component L5b having a negative refractive power, and a fifth c having a positive refractive power. The image component can be moved in the direction perpendicular to the optical axis by moving the fifth lens component L5b in a direction substantially perpendicular to the optical axis. 3. The telephoto zoom lens having the image stabilization function according to claim 1, wherein:
0.39 <| βb5b · (1-β5b) | <2.34 (3)
β5b: lateral magnification of the lens component L5b at infinite object distance βb5b: lateral magnification of the lens system positioned on the image side from the lens component L5b at infinite object distance
０．４９＜｜β２ｔ｜＜１．２６ （４）
β２ｔ：前記第２レンズ群Ｌ２の望遠端における物体距離無限遠での横倍率 The telephoto zoom lens having an image stabilization function according to any one of claims 1 to 3, wherein the following conditional expression is satisfied.
0.49 <| β2t | <1.26 (4)
β2t: lateral magnification at infinite object distance at the telephoto end of the second lens unit L2
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| JP2012063663A (en) * | 2010-09-17 | 2012-03-29 | Panasonic Corp | Zoom lens system, lens barrel, interchangeable lens device, and camera system |
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