Flash device

Details Flash device Flash device

1989-12-05

1991-03-12

Wintercorn, Richard A.

3541451, G03B 700

Patent

active

049996630

ABSTRACT:
A flash device comprises a pre-flash circuit which conducts a small flash a plurality of times for reducing the pupil size in response to a camera release signal just before the commencement of the shutter opening operation and a main flash circuit for conducting flash for taking a picture after the commencement of shutter opening operation.

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