JPS52139450A - Magnifying lens capable of simply transferring focal distance range - Google Patents
Magnifying lens capable of simply transferring focal distance rangeInfo
- Publication number
- JPS52139450A JPS52139450A JP5626576A JP5626576A JPS52139450A JP S52139450 A JPS52139450 A JP S52139450A JP 5626576 A JP5626576 A JP 5626576A JP 5626576 A JP5626576 A JP 5626576A JP S52139450 A JPS52139450 A JP S52139450A
- Authority
- JP
- Japan
- Prior art keywords
- distance range
- focal distance
- magnifying lens
- lens capable
- simply transferring
- 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.)
- Granted
Links
Landscapes
- Lenses (AREA)
Abstract
PURPOSE: To maintain the lens diameter of a rear group of a focusing lens group of a built-in extender system at a small level by interposing a movable lens group between the front and rear groups of the focusing lens group and by interposing a magnifying lens group between the movable lens group and the front group.
COPYRIGHT: (C)1977,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5626576A JPS52139450A (en) | 1976-05-17 | 1976-05-17 | Magnifying lens capable of simply transferring 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 |
---|---|---|---|
JP5626576A JPS52139450A (en) | 1976-05-17 | 1976-05-17 | Magnifying lens capable of simply transferring focal distance range |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS52139450A true JPS52139450A (en) | 1977-11-21 |
JPS617608B2 JPS617608B2 (en) | 1986-03-07 |
Family
ID=13022238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5626576A Granted JPS52139450A (en) | 1976-04-09 | 1976-05-17 | Magnifying lens capable of simply transferring focal distance range |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52139450A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58108510A (en) * | 1981-12-23 | 1983-06-28 | Canon Inc | Switching type variable power lens system |
-
1976
- 1976-05-17 JP JP5626576A patent/JPS52139450A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58108510A (en) * | 1981-12-23 | 1983-06-28 | Canon Inc | Switching type variable power lens system |
JPS6155091B2 (en) * | 1981-12-23 | 1986-11-26 | Canon Kk |
Also Published As
Publication number | Publication date |
---|---|
JPS617608B2 (en) | 1986-03-07 |
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