Photographic system for varying flash fire aperture as a functio

Details Photographic system for varying flash fire aperture as a functio Photographic system for varying flash fire aperture as a functio

1981-02-02

1982-05-11

Hix, L. T.

354 27, 354 33, 354 34, 354137, G03B 1505

Patent

active

043290310

ABSTRACT:
In a photographic exposure control system of the type which provides a flash fire signal at an appropriate follow focus aperture value corresponding to the camera-to-subject distance range, the ambient scene light intensity is measured prior to exposure and thereafter utilized to progressively vary the follow focus aperture value within determinate limits in inverse corresponding relation to the progressive variation of the detected ambient scene light intensity prior to exposure.

REFERENCES:
patent: 4188103 (1980-02-01), Biber et al.
patent: 4192587 (1980-03-01), LaRocque et al.

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