Synchronizing device for flash photography

Details Synchronizing device for flash photography Synchronizing device for flash photography

1984-12-19

1986-08-05

Perkey, William B.

G03B 1505

Patent

active

046039546

ABSTRACT:
The object distance from a range finder is factored into the guide number of the strobe to obtain an aperture value in binary form by a decoder. As the size of aperture opening of the shutter is increasing from the minimum to the maximum, a counter counts up a corresponding number of pulses in addition to the preset value of film speed. The output of the counter is compared with the output of the decoder by a comparator upon coincidence to produce an actuating signal for the strobe.

REFERENCES:
patent: 3742828 (1973-07-01), Nakajima et al.
patent: 4139289 (1979-02-01), Yamada et al.
patent: 4285585 (1981-08-01), Numata
patent: 4317624 (1982-03-01), Shenk

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