Camera and multiple flash photographing system

Details Camera and multiple flash photographing system Camera and multiple flash photographing system

2005-09-06

2005-09-06

Perkey, W. B. (Department: 2851)

Photography

Flash system responsive to focal length or distance

C396S157000, C396S182000

Reexamination Certificate

active

06941067

ABSTRACT:
Guide numbers tgn1,tgn2as expected light amounts of a main flashlight and a remote flashlight are added for the calculation of an expected illumination amount of each divided photometric region. If there is an over-illuminated region, among the divided photometric regions, in which the expected illumination amount exceeds a proper illumination amount for a subject, the guide numbers tgn1and tgn2are decreased such that of the two flashlights, the one illuminating the over-illuminated region more is given a larger decrease. In this manner, guide numbers gn1,gn2for main flash of the main flashlight and the remote flashlight are calculated so as to adjust the expected illumination amount of the over-illuminated region to a proper value.

REFERENCES:
patent: 3942076 (1976-03-01), Ellin
patent: 4951073 (1990-08-01), Slavitter
patent: 6075947 (2000-06-01), Tokunaga
patent: 6512890 (2003-01-01), Kawasaki et al.
patent: 57-177132 (1982-10-01), None
patent: A 57-177132 (1982-10-01), None
patent: A 58-21798 (1983-05-01), None
patent: 11-212148 (1999-08-01), None
patent: A 11-212148 (1999-08-01), None

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