JPS5358232A - Large aperture lens of long back focus - Google Patents
Large aperture lens of long back focusInfo
- Publication number
- JPS5358232A JPS5358232A JP13362076A JP13362076A JPS5358232A JP S5358232 A JPS5358232 A JP S5358232A JP 13362076 A JP13362076 A JP 13362076A JP 13362076 A JP13362076 A JP 13362076A JP S5358232 A JPS5358232 A JP S5358232A
- Authority
- JP
- Japan
- Prior art keywords
- back focus
- large aperture
- aperture lens
- long back
- lens
- 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 provide a light weight and inexpensive stadard lens for the single lens reflex camera by providing a back focus of a long focas distance of about 0.68W0.69 times on a five-element constitution which has the same specification as the lens of a six-element constitution.
COPYRIGHT: (C)1978,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13362076A JPS5358232A (en) | 1976-11-06 | 1976-11-06 | Large aperture lens of long back focus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13362076A JPS5358232A (en) | 1976-11-06 | 1976-11-06 | Large aperture lens of long back focus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5358232A true JPS5358232A (en) | 1978-05-26 |
JPS5642847B2 JPS5642847B2 (en) | 1981-10-07 |
Family
ID=15109067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13362076A Granted JPS5358232A (en) | 1976-11-06 | 1976-11-06 | Large aperture lens of long back focus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5358232A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0541661U (en) * | 1991-11-18 | 1993-06-08 | 株式会社プランナーズ | Polishing device for deburring |
-
1976
- 1976-11-06 JP JP13362076A patent/JPS5358232A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5642847B2 (en) | 1981-10-07 |
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