Lens-fitted photo film unit, and method of making photo-print
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United States of America Patent
Stats
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Apr 24, 2001
Grant Date -
N/A
app pub date -
Oct 25, 1999
filing date -
Oct 27, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lens-fitted photo film unit can take indoor- and night-photographs at adequate tone- and color-reproductions, by satisfying the condition: -6.ltoreq.2log.sub.2 (A)+log.sub.2 (1/T)-log.sub.2 (0.3.multidot.S).ltoreq.5 wherein T, A and S represents the shutter speed, the aperture size, and the ISO film speed. The film speed is determined to be not less than ISO640, and more preferably not less than ISO1000. The guide number (ISO100.multidot.m) of a flash device of the film unit is set to be in a range from 0.1 to 8, more preferably from 1 to 6, and most preferably from 3 to 5, and satisfies the condition: 8.0.ltoreq.log.sub.2 (G.sup.2)+log.sub.2 (1/T).ltoreq.12.0, in combination with the shutter speed T.
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Cited Art Landscape
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