发明名称 |
EXPOSURE CONTROL DEVICE FOR CAMERA |
摘要 |
In an exposure control device employed in an electronically controlled camera, an exposure value, representing the relation between an exposure time and an aperture value, is determined in accordance with the brightness of an object to be photographed. In addition, the open F-number of a lens is determined based on a predetermined film sensitivity. When the exposure value is determined, it is limited to a predetermined minimum exposure value. In the camera, the minimum exposure value is compensated in accordance with the film sensitivity of the film to be used.
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申请公布号 |
US5220364(A) |
申请公布日期 |
1993.06.15 |
申请号 |
US19910655103 |
申请日期 |
1991.02.14 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
KOBAYSHI, TAKEO;TABATA, YASUSHI;NUMAKO, NORIO;NAGAI, KATSUTOSHI |
分类号 |
G03B7/097;G03B7/08;G03B7/16;G03B7/20;G03B7/24;G03B15/05 |
主分类号 |
G03B7/097 |
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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