JPS5655913A - Telephoto lens - Google Patents
Telephoto lensInfo
- Publication number
- JPS5655913A JPS5655913A JP12389280A JP12389280A JPS5655913A JP S5655913 A JPS5655913 A JP S5655913A JP 12389280 A JP12389280 A JP 12389280A JP 12389280 A JP12389280 A JP 12389280A JP S5655913 A JPS5655913 A JP S5655913A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- movable
- refracting power
- stationary
- focusing
- 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 eliminate degradation in aberrations by constituting the rear lens group placed spacially from the front lens group by a lens group movable for the purpose of focusing and a stationary lens group for the purpose of aberration correction.
CONSTITUTION: Rear lens groups B, C of negative refracting power are disposed spacially on the optical axis from the front lens group A of positive refracting power. The rear lens group comprises a stationary lens group B and a movable lens group C. The lens group C movable in the optical axis direction is for the purpose of focusing to the subject and the stationary lens group B is for the purpose of correcting the aberrations produced in the front lens group A, has negative refracting power and has the 1st lens face of which the convex is directed to the subject side and the final lens face of which the concave is directed to the image side.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12389280A JPS5655913A (en) | 1980-09-05 | 1980-09-05 | Telephoto lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12389280A JPS5655913A (en) | 1980-09-05 | 1980-09-05 | Telephoto lens |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP49046920A Division JPS6059569B2 (en) | 1974-04-25 | 1974-04-25 | telescope lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5655913A true JPS5655913A (en) | 1981-05-16 |
Family
ID=14871923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12389280A Pending JPS5655913A (en) | 1980-09-05 | 1980-09-05 | Telephoto lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5655913A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4838138A (en) * | 1972-09-11 | 1973-06-05 | ||
JPS4917723A (en) * | 1972-06-07 | 1974-02-16 | ||
JPS50139732A (en) * | 1974-04-25 | 1975-11-08 | ||
JPS50151143A (en) * | 1974-05-25 | 1975-12-04 | ||
JPS52117126A (en) * | 1976-03-26 | 1977-10-01 | Minolta Camera Co Ltd | Telephoto lens system |
-
1980
- 1980-09-05 JP JP12389280A patent/JPS5655913A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4917723A (en) * | 1972-06-07 | 1974-02-16 | ||
JPS4838138A (en) * | 1972-09-11 | 1973-06-05 | ||
JPS50139732A (en) * | 1974-04-25 | 1975-11-08 | ||
JPS50151143A (en) * | 1974-05-25 | 1975-12-04 | ||
JPS52117126A (en) * | 1976-03-26 | 1977-10-01 | Minolta Camera Co Ltd | Telephoto lens system |
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