Photographic exposure control system with independent ambient an

Details Photographic exposure control system with independent ambient an Photographic exposure control system with independent ambient an

1977-10-11

1979-04-03

Adams, Russell E.

354 29, 354 59, G03B 716

Patent

active

041474180

ABSTRACT:
An exposure control system of the type embodying scanning type shutter blades includes two separate sets of photocell sweep secondary apertures in the shutter blades together with a single photoresponsive element wherein each set of secondary apertures may be controlled independently of the other set to admit scene light to the photoresponsive element in correspondence with the scene light admitted to the film plane during either an ambient or artificially scene lighted mode of operation.

REFERENCES:
patent: 3532046 (1970-10-01), Wienchol
patent: 3972057 (1976-07-01), Whiteside
patent: 4047190 (1977-09-01), Johnson et al.
patent: 4058817 (1977-11-01), Johnson et al.

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