JP2008129403A5 - - Google Patents
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- JP2008129403A5 JP2008129403A5 JP2006315448A JP2006315448A JP2008129403A5 JP 2008129403 A5 JP2008129403 A5 JP 2008129403A5 JP 2006315448 A JP2006315448 A JP 2006315448A JP 2006315448 A JP2006315448 A JP 2006315448A JP 2008129403 A5 JP2008129403 A5 JP 2008129403A5
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- optical system
- lens group
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- 230000003287 optical Effects 0.000 claims 15
- 230000002093 peripheral Effects 0.000 claims 2
- 230000005499 meniscus Effects 0.000 claims 1
Claims (12)
θgF1p=(Ng1p−Nd1p)/(NF1p−NC1p)
とするとき、
0.300<f/f1B<1.500
θgF1p+2.0×10−3・νd1p<0.656
νd1p<45.0
なる条件を満足することを特徴とする光学系。 In order from the object side to the image side, a first lens group does not move for focusing, comprising an aperture stop, a second lens unit having a positive refractive power and moves for focusing, the first lens group , a first 1A lens group consists of only the negative lens has a positive lens on the most object side is constituted from the 1B lens group having a positive refractive power composed of a plurality of lenses, the first 1A lens group has three or more negative lens of meniscus shape image side concave, at least one lens surface Ra1 of the 3 or more negative lens is aspherical, at least one positive lens constituting said 1B lens group L1Bp The Abbe number of the material of νd1p, the refractive index of the material of the positive lens L1Bp with respect to the g-line, d-line, F-line, and C-line in order, Ng1p, Nd1p, NF1p, NC1p, and the focal length of the entire system of the first B lens group The 々_F1B, is f,
θgF1p = (Ng1p−Nd1p) / (NF1p−NC1p)
When you and,
0.300 <f / f1B <1.500
θgF1p + 2.0 × 10 −3 · νd1p <0.656
νd1p <45.0
An optical system characterized by satisfying the following conditions.
θgF1n=(Ng1n−Nd1n)/(NF1n−NC1n)
とするとき、
θgF1n+1.3×10−3・νd1n>0.625
νd1n>60.0
なる条件を満足することを特徴とする請求項1の光学系。 The Abbe number of the material of at least one negative lens L1An constituting the first A lens group is νd1n, and the refractive indexes of the material of the negative lens L1An are gamma, d-line, F-line, and C-line in order, Ng1n, Nd1n, NF1n, NC1n,
θgF1n = (Ng1n−Nd1n) / (NF1n−NC1n)
When you and,
θgF1n + 1.3 × 10 −3 · νd1n> 0.625
νd1n> 60.0
The optical system according to claim 1, wherein the following condition is satisfied.
0.100<A1/f<0.300
なる条件を満足することを特徴とする請求項1から4のいずれか1項の光学系。 When the maximum aspherical amount from the reference spherical surface within the effective diameter of the lens surface Ra1 is A1 ,
0.100 <A1 / f <0.300
The optical system according to claim 1, wherein the following condition is satisfied.
θgF2p=(Ng2p−Nd2p)/(NF2p−NC2p)
とするとき、
θgF2p+1.3×10−3・νd2p>0.625
νd2p>60.0
なる条件を満足することを特徴とする請求項1から5のいずれか1項の光学系。 The Abbe number of the material of at least one positive lens L2p constituting the second lens group is νd2p, and the refractive indexes of the material of the positive lens L2p in the g-line, d-line, F-line, and C-line are Ng2p, Nd2p, NF2p, NC2p,
θgF2p = (Ng2p−Nd2p) / (NF2p−NC2p)
When you and,
θgF2p + 1.3 × 10 −3 · νd2p> 0.625
νd2p> 60.0
The optical system according to claim 1, wherein the following condition is satisfied.
θgF2n=(Ng2n−Nd2n)/(NF2n−NC2n)
とするとき、
θgF2n+2.0×10−3・νd2n<0.656
νd2n<45.0
なる条件を満足することを特徴とする請求項1から6のいずれか1項の光学系。 The Abbe number of the material of at least one negative lens L2n constituting the second lens group is νd2n, and the refractive indexes of the material of the negative lens L2n in the g-line, d-line, F-line, and C-line are sequentially Ng2n, Nd2n, NF2n, NC2n,
θgF2n = (Ng2n−Nd2n) / (NF2n−NC2n)
When you and,
θgF2n + 2.0 × 10 −3 · νd2n <0.656
νd2n <45.0
The optical system according to claim 1, wherein the following condition is satisfied.
−0.400<f/f1<0.600
なる条件を満足することを特徴とする請求項1から7のいずれか1項の光学系。 When the focal length of the first lens group is f1, and the focal length of the entire system is f,
-0.400 <f / f1 <0.600
The optical system according to claim 1, wherein the following condition is satisfied.
0.300<f/f2<0.700
なる条件を満足することを特徴とする請求項1から8のいずれか1項の光学系。 When the focal length of the second lens group is f2, and the focal length of the entire system is f,
0.300 <f / f2 <0.700
The optical system according to claim 1, wherein the following condition is satisfied.
−2.000<f/f1A<−0.600
なる条件を満足することを特徴とする請求項1から9のいずれか1項の光学系。 When the focal length of the first A lens group is f1A and the focal length of the entire system is f,
-2,000 <f / f1A <−0.600
The optical system according to claim 1, wherein the following condition is satisfied.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006315448A JP4898399B2 (en) | 2006-11-22 | 2006-11-22 | Optical system and imaging apparatus having the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006315448A JP4898399B2 (en) | 2006-11-22 | 2006-11-22 | Optical system and imaging apparatus having the same |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2008129403A JP2008129403A (en) | 2008-06-05 |
JP2008129403A5 true JP2008129403A5 (en) | 2009-12-24 |
JP4898399B2 JP4898399B2 (en) | 2012-03-14 |
Family
ID=39555254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006315448A Expired - Fee Related JP4898399B2 (en) | 2006-11-22 | 2006-11-22 | Optical system and imaging apparatus having the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4898399B2 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5170616B2 (en) * | 2007-04-23 | 2013-03-27 | 株式会社ニコン | Wide angle lens, imaging device, and focusing method of wide angle lens |
US8369030B2 (en) | 2009-05-25 | 2013-02-05 | Ricoh Company, Limited | Image forming lens, camera device, and handheld terminal |
JP5424745B2 (en) * | 2009-07-02 | 2014-02-26 | キヤノン株式会社 | Optical system and optical apparatus having the same |
JP5517546B2 (en) * | 2009-10-05 | 2014-06-11 | キヤノン株式会社 | Optical system and optical apparatus having the same |
JP5713763B2 (en) | 2011-04-04 | 2015-05-07 | キヤノン株式会社 | Optical system and optical apparatus having the same |
JP6413392B2 (en) * | 2014-06-30 | 2018-10-31 | 株式会社シグマ | Optical system |
JP6309478B2 (en) * | 2015-03-31 | 2018-04-11 | 富士フイルム株式会社 | Imaging lens and imaging apparatus |
JP6727785B2 (en) * | 2015-10-14 | 2020-07-22 | キヤノン株式会社 | Optical system and image pickup apparatus having the same |
DE102018106236B3 (en) * | 2018-03-16 | 2019-09-12 | Ernst Leitz Wetzlar Gmbh | Lens with fixed focal length |
JPWO2021199923A1 (en) * | 2020-03-31 | 2021-10-07 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4632724B2 (en) * | 2004-09-07 | 2011-02-16 | オリンパス株式会社 | Zoom lens |
JP4717493B2 (en) * | 2005-04-15 | 2011-07-06 | マミヤ・デジタル・イメージング株式会社 | Retro focus type super wide angle lens |
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2006
- 2006-11-22 JP JP2006315448A patent/JP4898399B2/en not_active Expired - Fee Related