JPS5323645A - Zoom lens capable of easy transfer for focal distance range - Google Patents
Zoom lens capable of easy transfer for focal distance rangeInfo
- Publication number
- JPS5323645A JPS5323645A JP9842776A JP9842776A JPS5323645A JP S5323645 A JPS5323645 A JP S5323645A JP 9842776 A JP9842776 A JP 9842776A JP 9842776 A JP9842776 A JP 9842776A JP S5323645 A JPS5323645 A JP S5323645A
- Authority
- JP
- Japan
- Prior art keywords
- group
- zoom lens
- distance range
- focal distance
- lens capable
- 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
Landscapes
- Lenses (AREA)
Abstract
PURPOSE: To achieve a simple optical system which features a constant back focus and a small diameter of the rear lens group by constituting the image formation lens group with the front group, the attachment/detachment group of the positive refractive index and the rear group and by securing a replaceable mounting between the attachment/detachment group and the magnification change group.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9842776A JPS5323645A (en) | 1976-08-17 | 1976-08-17 | Zoom lens capable of easy transfer for focal distance range |
US05/784,787 US4146305A (en) | 1976-04-09 | 1977-04-05 | Variable lens which can have its focal distance range easily changed |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9842776A JPS5323645A (en) | 1976-08-17 | 1976-08-17 | Zoom lens capable of easy transfer for focal distance range |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5323645A true JPS5323645A (en) | 1978-03-04 |
Family
ID=14219500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9842776A Pending JPS5323645A (en) | 1976-04-09 | 1976-08-17 | Zoom lens capable of easy transfer for focal distance range |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5323645A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5762437U (en) * | 1980-09-29 | 1982-04-13 | ||
JPS5784417A (en) * | 1980-11-13 | 1982-05-26 | Canon Inc | Optical system for focal length conversion |
JPS60208723A (en) * | 1984-04-02 | 1985-10-21 | Canon Inc | Fast zoom lens of high variable power |
JPH02100010A (en) * | 1988-10-07 | 1990-04-12 | Canon Inc | Zoom lens variable in variable power range |
JPH02100009A (en) * | 1988-10-07 | 1990-04-12 | Canon Inc | Zoom lens variable in variable power range |
WO2019131992A1 (en) * | 2017-12-29 | 2019-07-04 | 株式会社ニコン | Optical system, optical equipment, and optical system manufacturing method |
JP2019120770A (en) * | 2017-12-29 | 2019-07-22 | 株式会社ニコン | Optical system, optical device, and method for manufacturing optical system |
-
1976
- 1976-08-17 JP JP9842776A patent/JPS5323645A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5762437U (en) * | 1980-09-29 | 1982-04-13 | ||
JPS5784417A (en) * | 1980-11-13 | 1982-05-26 | Canon Inc | Optical system for focal length conversion |
JPS60208723A (en) * | 1984-04-02 | 1985-10-21 | Canon Inc | Fast zoom lens of high variable power |
JPH02100010A (en) * | 1988-10-07 | 1990-04-12 | Canon Inc | Zoom lens variable in variable power range |
JPH02100009A (en) * | 1988-10-07 | 1990-04-12 | Canon Inc | Zoom lens variable in variable power range |
WO2019131992A1 (en) * | 2017-12-29 | 2019-07-04 | 株式会社ニコン | Optical system, optical equipment, and optical system manufacturing method |
JP2019120770A (en) * | 2017-12-29 | 2019-07-22 | 株式会社ニコン | Optical system, optical device, and method for manufacturing optical system |
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