Exposure control apparatus with compensation for film reciprocity failure
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United States of America Patent
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-
Apr 28, 1981
Grant Date -
N/A
app pub date -
Jan 29, 1979
filing date -
Jan 29, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A camera includes a photographic film having a given film speed which decreases when the film is exposed to light which varies from a given illumination level. A camera shutter is controlled by a timing circuit adapted to produce an exposure which is adjusted to compensate for the decreased film speed.
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