Photographic apparatus having synchronized flash

Details Photographic apparatus having synchronized flash Photographic apparatus having synchronized flash

1980-07-28

1982-06-15

Hix, L. T.

354 33, 354 60F, 354195, G03B 1505, G03B 1320

Patent

active

043347444

ABSTRACT:
Photographic apparatus, e.g., a camera, having a synchronized flash. The camera includes a ranging system, an objective lens assembly movable between first and second positions for focusing an object at the camera's focal plane, a source of artificial illumination for illuminating the object, and a flash fire control in the form of an electronic flash initiation timer. The flash fire control receives an input from the ranging system which is representative of the camera-to-subject distance, and an input from the objective lens assembly upon its release for movement toward the second position. The flash fire control correlates these inputs so as to fire the source of artificial illumination while the lens assembly is still moving toward the second position and the object is in focus. In one embodiment, the intensity and/or the duration of the light from the artificial source of illumination is changed as a function of an exposure parameter, e.g., camera-to-subject distance.

REFERENCES:
patent: 3634725 (1972-01-01), Biber
patent: 3646865 (1972-03-01), Biber
patent: 3714443 (1973-01-01), Ogawa
patent: 4167316 (1979-09-01), Johnson et al.
patent: 4188103 (1980-02-01), Biber et al.

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