Flash photography apparatus

Details Flash photography apparatus Flash photography apparatus

1984-06-28

1985-09-24

Perkey, William B.

3541271, G03B 1505

Patent

active

045429740

ABSTRACT:
In the disclosed flash unit, a preliminary flash for evaluating a proper exposure precedes a main flash. A flash exposure control apparatus respond to tilting of the flash's head after a preliminary flash to present a warning signal, or to renew the preliminary flash and thereby to readjust the aperture to the new exposure condition.

REFERENCES:
patent: 4078240 (1978-03-01), Kaneko et al.
patent: 4465353 (1984-08-01), Yoshida et al.
patent: 4484807 (1984-11-01), Kataoka et al.
patent: 4486690 (1984-12-01), Takematsu

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