Single lens reflex camera with automatic exposure control circui

Details Single lens reflex camera with automatic exposure control circui Single lens reflex camera with automatic exposure control circui

1977-02-09

1979-03-27

Gellner, Michael L.

354 60L, G03B 1706

Patent

active

041463196

ABSTRACT:
A single lens reflex camera with an automatic exposure control circuit includes a photodetector and a light emitting indicator in the viewfinder optical system. The light emitting indicator is energized to emit light with high luminance for a predetermined period when the electric power source is turned on in the camera. By the high luminance light emission of the light emitting indicator, the photodetector in the exposure control circuit is preliminarily exposed to light before it starts to measure scene brightness. Thus, the response of the photodetector is enhanced.

REFERENCES:
patent: 3127823 (1964-04-01), Babcock et al.
patent: 3528350 (1970-09-01), Schmitt
patent: 3860936 (1975-01-01), Harvey
patent: 3955892 (1976-05-01), Numata et al.
patent: 3997904 (1976-12-01), Schutze et al.
patent: 4001845 (1977-01-01), Maitani et al.

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