G - Physics – 03 – B
Patent
G - Physics
03
B
315/12, 95/53.3
G03B 7/00 (2006.01) G03B 7/16 (2006.01)
Patent
CA 1070544
ABSTRACT OF THE DISCLOSURE An artificial illumination control system is provided for a photographic camera for operation in a manner whereby under extremely low levels of ambient light intensity, the control system initiates the energization of a source of arti- ficial illumination at a predetermined time period subsequent to the initiation of the exposure interval while under conditions of substantially higher levels of ambient light intensity, the control system initiates the energization of the source of artificial illumination as a consequence of the time integration the scene light intensity incident to a photoresponsive elem??t reaching a predetermined value. Hence, the artificial illu- mination control system may be automatically operated in both a normal flash mode and a "fill-in flash" mode.
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