Photographic equipment

Details Photographic equipment Photographic equipment

1982-01-11

1984-01-03

Perkey, William B.

Illumination

Supported by vehicle structure

Condition responsive

362 18, G03B 1505

Patent

active

044239408

ABSTRACT:
A photographic equipment provided with a focal-length sensing means for sensing the focal length of a photographic lens mounted on a camera body and generating the electrical output signal representative of the detected focal length and a beam-angle control means responsive to the output signal from the focal-length sensing means for changing, in response to the detected focal length, the beam angle of an electronic flash unit mounted on the camera body.

REFERENCES:
patent: 3738240 (1973-06-01), Mitani et al.
patent: 3843231 (1974-10-01), Borel et al.
patent: 4141059 (1979-02-01), Shiojiri
patent: 4323952 (1982-04-01), Proske
patent: 4325621 (1982-04-01), Iwata et al.

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