1988-05-24
1990-03-27
Adams, Russell E.
354432, G03B 300
Patent
active
049124951
ABSTRACT:
A light measuring device in which the field of a photometric system is divided into a plurality of areas, and the outputs of these areas are computed based on the one of various formulae which is selected depending on the relative size of the subject image to the total field as the focal length of a photographic lens varies, to obtain an exposure value.
REFERENCES:
patent: 3762286 (1973-10-01), Masegawa
patent: 4306787 (1981-12-01), Fukuhara et al.
patent: 4391500 (1983-07-01), Tsunekawa
patent: 4477164 (1984-10-01), Nakai et al.
patent: 4636054 (1987-01-01), Saegusa
Aihara Yoshihiko
Ishikawa Masanori
Kiyohara Shuichi
Shimizu Masao
Yamada Akira
Adams Russell E.
Canon Kabushiki Kaisha
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