Electronic flash device

Details Electronic flash device Electronic flash device

1992-07-17

1993-11-30

Hayes, Monroe H.

354126, 3541271, G03B 1503

Patent

active

052669904

ABSTRACT:
An electronic flash device which is pivotally movable about an axis intersecting the focal plane of a photo-taking lens and of which the light distribution is changed relative to the angle of view of a camera by pivotally moving comprises a light distribution setting device for setting the amount of light distribution, a posture detecting device for detecting the posture of the electronic flash device relative to the camera, a determining device for determining the amount of light distribution on the basis of a desired amount of light distribution set by the light distribution setting device and the posture detected by the posture detecting device, and a light distribution changing device for controlling the light distribution on the basis of the amount of light distribution determined by the determining device.

REFERENCES:
patent: 4078240 (1978-03-01), Kaneko et al.
patent: 4512644 (1985-04-01), Yoshida
patent: 4866465 (1989-09-01), Gallegos
patent: 4916475 (1990-04-01), Hori
patent: 5019845 (1991-05-01), Asakura

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