发明授权
US4181411A Indicator device used in camera to indicate exposure values within a finder 失效
在相机中用于指示取景器中的曝光值的指示灯

Indicator device used in camera to indicate exposure values within a
finder
摘要:
An apparatus to be used in a camera to digitally indicate inside the viewfinder, film exposure values based upon iris opening, shutter speed and film exposure index.
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