发明名称 |
Photographic apparatus |
摘要 |
A photographic apparatus in which light entering through an objective is used in photo-electrically detecting the state of focus of a range finder area in the view field, whereby a mask for defining that area is arranged in the effective light beam at or near a predetermined focal plane of the objective and is made to serve as a light meter of thin film form constituting part of an exposure control system.
|
申请公布号 |
US4697905(A) |
申请公布日期 |
1987.10.06 |
申请号 |
US19850802760 |
申请日期 |
1985.11.27 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
FUJIBAYASHI, KAZUO;TSUNEKAWA, TOKUICHI;OHMURA, HIROSHI |
分类号 |
G02B7/34;G03B7/099;(IPC1-7):G03B3/00 |
主分类号 |
G02B7/34 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|