G - Physics – 03 – B
Patent
G - Physics
03
B
95/53.3
G03B 7/16 (2006.01) G03B 7/091 (2006.01)
Patent
CA 1272057
ABSTRACT OF THE DISCLOSURE A photographic camera of the type having a quench-type strobe, a scanning blade shutter and an exposure control system having separate ambient and artificial light sensing devices for establishing dis- tinct signals representative of the amount of ambient and artificial light illuminating a particular scene, is provided with a unitary, manually operable electronic trim control for simultaneously varying both of these signals, to a limited degree, to compensate for varia- tions in ambient scene lighting conditions and/or slight variations in the sensitometric characteristics of a photographic film. The electronic trim control system includes a common voltage source capable of providing a plurality of different magnitude trim voltages for regu- lating both ambient and artificial scene light levels. The electronic trim control couples a manually selected common trim voltage corresponding to desired ambient and artificial scene light levels to shutter and strobe control circuitry for ambient and strobe light control purposes.
515559
Polaroid Corporation
Smart & Biggar
LandOfFree
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