Flash photography system

Details Flash photography system Flash photography system

1989-01-17

1991-05-21

Hix, L. T.

354421, 3541271, G03B 700, G03B 1505

Patent

active

050179560

ABSTRACT:
A flash photography system of the kind performing a flash adjusting action in a mode of adjusting an aperture value, a guide number, etc. according to a distance to an object to be photographed is arranged to allow the flash adjusting action to be performed in the above-stated mode only when a combination of the object distance detected by an automatic focusing device and the focal length currently set shows a given value. If the combination fails to show the given value, the system either has the flash adjusting action performed in a manner which differs from the above-stated mode or allows the flash adjusting action to be performed in the above-stated mode by changing the focal length of a photo-taking lens.

REFERENCES:
patent: 4494850 (1985-01-01), Katsuma et al.

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