Exposure control circuit for TTL automatic electronic flash

Details Exposure control circuit for TTL automatic electronic flash Exposure control circuit for TTL automatic electronic flash

1982-10-08

1985-04-30

Hix, L. T.

354418, 354422, 354448, 354441, G03B 716

Patent

active

045140740

ABSTRACT:
An exposure control circuit associated with TTL automatic electronic flash includes a diaphragm control circuit. When the electronic flash is mounted on a TTL direct photometry camera capable of photometry of reflection from a film surface in order to take a picture with the aid of the electronic flash, the diaphragm control circuit assures the emission of light from the electronic flash in a reliable manner, by automatically establishing a diaphragm value between a given diaphragm value and a minimum diaphragm value, the established diaphragm value assuring a proper exposure with an exposure period which is closely synchronized with the operation of the electronic flash.

REFERENCES:
patent: 4367023 (1983-01-01), Ishida et al.
patent: 4371243 (1983-02-01), Takishima et al.

Affiliated with

Also associated with

Rating

Exposure control circuit for TTL automatic electronic flash does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposure control circuit for TTL automatic electronic flash, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposure control circuit for TTL automatic electronic flash will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1965663