Method of and apparatus for establishing a programmable exposure

Details Method of and apparatus for establishing a programmable exposure Method of and apparatus for establishing a programmable exposure

1987-03-06

1988-05-17

Adams, Russell E.

354441, G03B 7097

Patent

active

047454288

ABSTRACT:
When establishing a program exposure response of a camera, an EV value is calculated from the brightness of an object being photographed, a film speed and the like, and a programmed calculation is made on the basis of a preset program response and the EV value to determine an exposure period and a diaphragm aperture in the absence of a program shift input. However, in the presence of a program shift operation, the relationship between an exposure period and a diaphragm aperture is shifted through a given number of steps, and a new program response is established so that the exposure period and the diaphragm aperture varies according to an EV value from their shifted value, thus determining an exposure control value.

REFERENCES:
patent: 4103307 (1978-07-01), Shinoda et al.
patent: 4213682 (1980-07-01), Yamada
patent: 4320944 (1982-03-01), Nakai
patent: 4455068 (1984-06-01), Izuhara
patent: 4496230 (1985-01-01), Nakai et al.
patent: 4616916 (1986-10-01), Someya et al.
patent: 4653893 (1987-03-01), Inoue et al.
patent: 4673277 (1987-06-01), Someya et al.

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