Photographic apparatus with controlled shutter blade time out

Details Photographic apparatus with controlled shutter blade time out Photographic apparatus with controlled shutter blade time out

1980-09-22

1982-08-31

Hix, L. T.

354 51, 354133, 354137, 354234, G03B 7097, G03B 716, G03B 1505

Patent

active

043469710

ABSTRACT:
A photographic camera is provided with a fully automatic exposure control system for determining the camera-to-subject range either directly by sonic ranging or indirectly by sampling reflected flash light immediately subsequent to the firing of a source of artificial illumination and for automatically responding to either the sonically determined subject range or the sampled flash light to provide either a shortened maximum exposure interval time out period under conditions where the photographic subject is located far enough from the camera as to be just beyond the effective range of the flash or within the effective range of the flash but without sufficient reflectance to effect the termination of exposure solely as a function of scene light integration or an extended maximum exposure interval time out period under conditions where the photographic subject is located far enough from the camera as to be far beyond the effective range of the flash where there is likely to be little or no reflected flash light.

REFERENCES:
patent: 3522763 (1970-08-01), Dietz
patent: 3620143 (1971-11-01), Burgarella
patent: 3916425 (1975-10-01), Tanaka
patent: 3942183 (1976-03-01), Whiteside
patent: 4023187 (1977-05-01), Shenk
patent: 4024549 (1977-05-01), Matsumoto
patent: 4035813 (1977-07-01), Whiteside
patent: 4040072 (1977-08-01), Johnson et al.
patent: 4140379 (1979-02-01), von Fischern
patent: 4188103 (1980-02-01), Biber et al.
patent: 4192587 (1980-03-01), LaRocque et al.

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