Flash photography system

Details Flash photography system Flash photography system

1986-02-12

1987-12-01

Perkey, W. B.

354416, 3541491, G03B 1505

Patent

active

047100125

ABSTRACT:
In a flash photography system which controls the amount of flash based on an aperture value of a lens set by detecting reflected light from an object which is preliminarily illuminated prior to main illumination, the angle of illumination coverage of a main light issuing portion is variable, and the amount of light from the preliminary illumination is determined corresponding to that varied angle. The aperture value of the lens is properly set by the preliminary illumination corresponding to that varied angle.

REFERENCES:
patent: 4465353 (1984-08-01), Yoshida et al.
patent: 4484807 (1984-11-01), Kataoka et al
patent: 4501481 (1985-02-01), Kataoka et al.
patent: 4512644 (1985-04-01), Yoshida
patent: 4542974 (1985-09-01), Yoshikawa et al.
patent: 4547057 (1985-10-01), Kataoka
patent: 4572644 (1986-02-01), Kataoka et al.
patent: 4610525 (1986-09-01), Yoshida et al.

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