Flash-assisted photographing system and a device for use in the

Details Flash-assisted photographing system and a device for use in the Flash-assisted photographing system and a device for use in the

1996-10-02

1998-09-29

Adams, Russell E.

Photography

Flash system responsive to focal length or distance

396 63, G03B 1502

Patent

active

058157433

ABSTRACT:
A flash-assisted photographing system including a camera having a taking lens capable of varying the focal length and a flash is provided with a light receiving unit having a plurality of receiving areas operable to separately receive light reflected by different areas of a photographic view, a detector operable to detect a focal length of the taking lens, and a controller operable to set weights for the receiving areas based on a detected focal length. Proper weights are set for the receiving areas even in the case of close-up photography which is highly influenced by camera shake. A main subject can be reliably exposed at a proper light emission.

REFERENCES:
patent: 4494850 (1985-01-01), Katsuma et al.
patent: 4746947 (1988-05-01), Nakai
patent: 4912495 (1990-03-01), Ishikawa et al.
patent: 5006879 (1991-04-01), Takagi et al.
patent: 5017956 (1991-05-01), Murata
patent: 5159384 (1992-10-01), Kageyama et al.

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