Scene light responsive variable quench time delay for quench str

Details Scene light responsive variable quench time delay for quench str Scene light responsive variable quench time delay for quench str

1976-05-13

1978-02-07

Adams, Russell E.

354 27, 354 34, 354 60F, 354128, 354139, G03B 716

Patent

active

040729648

ABSTRACT:
A photographic camera apparatus is provided with an automatic illumination and exposure control system for controlling a pair of scanning type shutter blade elements as well as a flash fire and quench signal directed to a quench strobe operatively associated therewith. The camera apparatus may be operated in either a "fill-in" flash mode of operation or an ordinary flash mode. During the "fill-in" flash mode of operation, the time delay in quenching the strobe is progressively decreased as a function of increasing ambient scene light intensity so that the shutter blade elements admit progressively less reflected strobe light from the subject during the finite time required for the shutter blade elements to close.

REFERENCES:
patent: 3756132 (1973-09-01), Ogawa
patent: 3993928 (1976-11-01), Wilwerding

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