Exposure control system for use in a photographic camera

Details Exposure control system for use in a photographic camera Exposure control system for use in a photographic camera

G - Physics

03

B

95/53.7

G03B 7/08 (2006.01)

Patent

CA 1109710

ABSTRACT OF THE DISCLOSURE A photographic camera apparatus is provided with an exposure control system which includes a single photodetector and a pair of multi-apertured, counter- reciprocating blade elements that cooperate in a pre-exposure mode to provide a photodetector output signal which is utilized to measure and indicate the presence of a low scene brightness condition requiring the use of an artificial light source to illuminate the scene, and thereafter cooperate, during an exposure mode, in a manner whereby the photodetector's output is utilized to control the amount of exposure delivered to film located within the camera.

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