发明名称 |
Image magnification control device for a camera |
摘要 |
An image magnification control device for a camera. Control focal length required to maintain an image magnification constant is computed based upon defocus infomation detected by using a light having passed through a photographic lens. In case focal length of the photographic lens comes out of a range wherein the set image magnification can be obtained, various operations such as shutter-release lock operation are executed depending upon designs. |
申请公布号 |
EP0725293(A3) |
申请公布日期 |
1998.02.04 |
申请号 |
EP19960105375 |
申请日期 |
1989.09.22 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
SUZUKI, NOBURO;KAWASAKI, MASAHIRO;TOJI, SHIGEO |
分类号 |
G02B7/10;G02B7/28 |
主分类号 |
G02B7/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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