Camera and external flash device

Details Camera and external flash device Camera and external flash device

1997-02-19

1999-09-21

Lee, Eddie C.

Photography

Flash system responsive to focal length or distance

Illumination angle responds to focal length or distance

396175, G03B 1502, G03B 1506

Patent

active

059565314

ABSTRACT:
A camera to which an external flash device may be mounted has a focal length detecting device which detects the focal length of a photo-taking lens, a conversion device which converts the detected focal length information into focal length information having a prescribed relationship to the detected focal length information, and a transmitter which transmits the converted focal length information to the external flash device.

REFERENCES:
patent: 4306792 (1981-12-01), Prochnow
patent: 4935759 (1990-06-01), Tsuji et al.
patent: 5068678 (1991-11-01), Mogamiya et al.
patent: 5250970 (1993-10-01), Sakamoto et al.
patent: 5335041 (1994-08-01), Fox
patent: 5363162 (1994-11-01), Kaihara et al.
patent: 5473404 (1995-12-01), Stephenson

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