1985-11-25
1988-07-05
Hix, L. T.
3541451, 35412713, 35412711, G03B 700, G03B 1501
Patent
active
047558458
ABSTRACT:
A flash photography system for a photographic camera and a flash device adapted to be connected thereto with the camera providing an aperture value output for flash light photography and a flash light stop signal obtained from an integrated output of the light reflected from a photographic object to terminate flash light emission when the integrated value reaches a predetermined value. The flash device calculates a maximum photographing distance covered by the flash light for effecting a correct exposure of the photographic object from the maximum flash light value and the aperture value from the camera. The maximum photographing distance is displayed by a suitable display visible to the camera operator.
REFERENCES:
patent: 4258991 (1981-03-01), Kuraishi
patent: 4297011 (1981-10-01), Adams, Jr.
patent: 4422744 (1983-12-01), Maida
patent: 4444483 (1984-04-01), Nakajima
patent: 4494851 (1985-06-01), Maida et al.
patent: 4542975 (1985-09-01), Ishida et al.
patent: 4573786 (1986-03-01), Taniguchi et al.
Hosomizu Hiroshi
Inoue Toru
Nakai Masaaki
Niwa Masatake
Omaki Takanobu
Gray David M.
Hix L. T,.
Minolta Camera KK
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