JPS56158316A - Wide-angle zoom lens - Google Patents
Wide-angle zoom lensInfo
- Publication number
- JPS56158316A JPS56158316A JP6204680A JP6204680A JPS56158316A JP S56158316 A JPS56158316 A JP S56158316A JP 6204680 A JP6204680 A JP 6204680A JP 6204680 A JP6204680 A JP 6204680A JP S56158316 A JPS56158316 A JP S56158316A
- Authority
- JP
- Japan
- Prior art keywords
- positive
- group
- negative
- refractive power
- wide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
- G02B7/105—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens with movable lens means specially adapted for focusing at close distances
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
PURPOSE:To obtain a wide-angle zoom lens system having a comparatively large wide-angle end picture angle and a good compensation of aberration with a brightness of F3.5-F2.8, by distributing the 1st group of a negative refractive power, the 2nd group of a positive refractive power and the 3rd group of a positive refractive power in that order from the object field and in a relative movable way to each other and thus satisfying various terms. CONSTITUTION:The lens system consists of the 2nd and 3rd groups of a negative refractive power and a postive refractive power distributed in a relative movable way to each other plus the 1st group. The 1st group comprises at least >=2 positive lenses and >=2 negative lenses, and the 2nd group consists of at least >=4 positive lenses plus >=1 negative lens in a positive-negative-positive triplet array. The 3rd group comprises at least a positive lens and a negative lens. Thus the terms (1)- (3) are satisfied, where f1, f2 and f3 are focal distances of the 1st, 2nd and 3rd groups respectively.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6204680A JPS56158316A (en) | 1980-05-10 | 1980-05-10 | Wide-angle zoom lens |
US06/254,409 US4465343A (en) | 1980-05-10 | 1981-04-15 | Zoom lens system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6204680A JPS56158316A (en) | 1980-05-10 | 1980-05-10 | Wide-angle zoom lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56158316A true JPS56158316A (en) | 1981-12-07 |
Family
ID=13188821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6204680A Pending JPS56158316A (en) | 1980-05-10 | 1980-05-10 | Wide-angle zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56158316A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5262897A (en) * | 1991-12-13 | 1993-11-16 | Olympus Optical Co., Ltd. | Zoom lens system |
US6308011B1 (en) | 1998-03-31 | 2001-10-23 | Canon Kabushiki Kaisha | Zoom lens and photographic apparatus having the same |
KR100467955B1 (en) * | 2002-11-13 | 2005-01-24 | 삼성테크윈 주식회사 | Zoom lens |
WO2022172821A1 (en) * | 2021-02-12 | 2022-08-18 | 株式会社ニコン | Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5535323A (en) * | 1978-09-04 | 1980-03-12 | Sigma:Kk | Super wide-angle zoom lens |
-
1980
- 1980-05-10 JP JP6204680A patent/JPS56158316A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5535323A (en) * | 1978-09-04 | 1980-03-12 | Sigma:Kk | Super wide-angle zoom lens |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5262897A (en) * | 1991-12-13 | 1993-11-16 | Olympus Optical Co., Ltd. | Zoom lens system |
US6308011B1 (en) | 1998-03-31 | 2001-10-23 | Canon Kabushiki Kaisha | Zoom lens and photographic apparatus having the same |
KR100467955B1 (en) * | 2002-11-13 | 2005-01-24 | 삼성테크윈 주식회사 | Zoom lens |
WO2022172821A1 (en) * | 2021-02-12 | 2022-08-18 | 株式会社ニコン | Variable magnification optical system, optical device, and method for manufacturing variable magnification optical system |
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