发明名称 Photographic camera apparatus for visually indicating the status of an exposure trim mechanism
摘要 A photographic camera of the type having an automatic exposure control system which regulates the exposure delivered to a film of predetermined speed and which includes a manually operable exposure trim mechanism which varies the control of the exposure control system in accordance with the trim mechanism's position is provided with apparatus by which a visual indication of the status of the trim mechanism is provided in the camera's viewfinder.
申请公布号 US4200373(A) 申请公布日期 1980.04.29
申请号 US19780929840 申请日期 1978.07.31
申请人 POLAROID CORP 发明人 JOHNSON, BRUCE K
分类号 G03B17/20;(IPC1-7):G03B17/20 主分类号 G03B17/20
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