JP2008070433A5 - - Google Patents
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- JP2008070433A5 JP2008070433A5 JP2006246632A JP2006246632A JP2008070433A5 JP 2008070433 A5 JP2008070433 A5 JP 2008070433A5 JP 2006246632 A JP2006246632 A JP 2006246632A JP 2006246632 A JP2006246632 A JP 2006246632A JP 2008070433 A5 JP2008070433 A5 JP 2008070433A5
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- JP
- Japan
- Prior art keywords
- lens
- refractive power
- teleconverter
- cemented
- master
- Prior art date
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- 238000003384 imaging method Methods 0.000 claims 3
- 230000004075 alteration Effects 0.000 claims 2
- 230000003287 optical Effects 0.000 claims 1
Claims (8)
物体側から像側へ順に、光軸方向に最も広い空気間隔を境に、正の屈折力の前群と負の屈折力の後群より成り、
該前群は、負の屈折力の第１１レンズと正の屈折力の第１２レンズとを接合した、全体として正の屈折力の第１接合レンズ、正の屈折力の第１３レンズより成り、
該後群は、正の屈折力の第２１レンズと負の屈折力の第２２レンズとを接合した、全体として負の屈折力の第２接合レンズより成り、
該第１１レンズと第１２レンズの材料のアッベ数を各々ν１１、ν１２とするとき
３０＜ν１１＜５０
２５＜ν１２−ν１１
なる条件を満足することを特徴とするテレコンバータレンズ。 A teleconverter lens mounted on the object side of the master lens,
In order from the object side to the image side, it consists of a front group of positive refractive power and a rear group of negative refractive power, with the widest air interval in the optical axis direction as a boundary.
The front group includes a first cemented lens having a positive refractive power and a 13th lens having a positive refractive power as a whole, in which an eleventh lens having a negative refractive power and a twelfth lens having a positive refractive power are cemented.
The rear group includes a second cemented lens having a negative refractive power as a whole, in which a 21st lens having a positive refractive power and a 22nd lens having a negative refractive power are cemented.
When the Abbe numbers of the materials of the eleventh lens and the twelfth lens are ν11 and ν12, respectively, 30 <ν11 <50
25 <ν12−ν11
A teleconverter lens characterized by satisfying the following conditions:
０．２(1/mm)＜ΦF・ν１１＜０．６(1/mm)
なる条件を満足することを特徴とする請求項１のテレコンバータレンズ。 When the refractive power of the front group is ΦF,
0.2 (1 / mm) <ΦF · ν11 <0.6 (1 / mm)
The teleconverter lens according to claim 1, wherein the following condition is satisfied.
５．０＜ΦF・ｄF・ν１１＜１５．０
なる条件を満足することを特徴とする請求項１又は２のテレコンバータレンズ。 When the refractive power of the front group is ΦF, and the distance from the most object-side surface vertex of the front group to the most image-side surface vertex is dF,
5.0 <ΦF · dF · ν11 <15.0
The teleconverter lens according to claim 1 or 2, wherein the following condition is satisfied.
−１．０(1/mm)＜Φc／（１／ν１１−１／ν１２）＜−０．３(1/mm)
なる条件を満足することを特徴とする請求項１乃至３いずれか１項のテレコンバータレンズ。 When the power of the cemented surface of the first cemented lens is Φc,
−1.0 (1 / mm) <Φc / (1 / ν11−1 / ν12) <− 0.3 (1 / mm)
It claims 1 to 3 any one of teleconverter lens satisfies the following condition.
−１．６＜（Φc／Φ1c）／（１／ν１１−１／ν１２）／1000＜−０．０１
なる条件を満足することを特徴とする請求項１乃至４いずれか１項のテレコンバータレンズ。 When the power of the cemented surface of the first cemented lens is Φc and the refractive power of the first cemented lens is Φ1c,
−1.6 <(Φc / Φ1c) / (1 / ν11−1 / ν12) / 1000 <−0.01
Teleconverter lens according to claim 1 to 4 any one, characterized by satisfying the following condition.
０．４＜δsk(T)／（δsk(M)×β）＜１．０
なる条件を満足することを特徴とする請求項７の撮像装置。 The difference between the axial chromatic aberrations of the d-line and g-line with respect to the infinite object in the entire system in which the master lens and the teleconverter lens are mounted on the master lens are respectively expressed as δsk (M) and δsk (T) In the case of a zoom lens, the longitudinal chromatic aberration is a value at the telephoto end), and when the afocal magnification of the teleconverter lens is β,
0.4 <δsk (T) / (δsk (M) × β) <1.0
The imaging apparatus according to claim 7, wherein the following condition is satisfied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006246632A JP4898361B2 (en) | 2006-09-12 | 2006-09-12 | Teleconverter lens and imaging apparatus having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006246632A JP4898361B2 (en) | 2006-09-12 | 2006-09-12 | Teleconverter lens and imaging apparatus having the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008070433A JP2008070433A (en) | 2008-03-27 |
| JP2008070433A5 true JP2008070433A5 (en) | 2009-10-22 |
| JP4898361B2 JP4898361B2 (en) | 2012-03-14 |
Family
ID=39292098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006246632A Expired - Fee Related JP4898361B2 (en) | 2006-09-12 | 2006-09-12 | Teleconverter lens and imaging apparatus having the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4898361B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6219189B2 (en) | 2014-02-07 | 2017-10-25 | 富士フイルム株式会社 | Teleconverter lens and imaging device |
| CN107272159B (en) * | 2017-08-10 | 2022-12-27 | 福鼎市一雄光学仪器有限公司 | Close-up lens for assisting image quality detection of video surveillance camera lens and detection method |
| GB2583820B (en) * | 2019-02-27 | 2022-03-02 | Canon Kk | Converter lens, interchangeable lens, and image capturing apparatus |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10197792A (en) * | 1996-12-27 | 1998-07-31 | Olympus Optical Co Ltd | Teleconverter lens |
| JP4383758B2 (en) * | 2003-03-03 | 2009-12-16 | キヤノン株式会社 | Teleconverter |
| JP4715141B2 (en) * | 2004-09-15 | 2011-07-06 | 株式会社ニコン | Front teleconverter lens |
-
2006
- 2006-09-12 JP JP2006246632A patent/JP4898361B2/en not_active Expired - Fee Related
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