Selection and setting device for camera exposure control

Details Selection and setting device for camera exposure control Selection and setting device for camera exposure control

1981-02-25

1982-08-17

Adams, Russell E.

354 23D, G03B 708

Patent

active

043446817

ABSTRACT:
In a multi-mode exposure control device for a photographic camera which automatically controls camera exposure in any desired one of diaphragm aperture priority mode, shutter speed priority mode and program mode, the selection of the exposure control mode as well as the setting of the exposure parameter to be manually determined are effected by manual operation of a single one of a plurality of manual members. A signal selector circuit receives three pairs of diaphragm control and shutter control signals for the three exposure control modes, and selects one of the pairs depending on the last operated one of diaphragm aperture setting, shutter speed setting and program mode selecting manual members. The selected pair of diaphragm control signal and shutter control signal are respectively supplied to diaphragm and shutter control circuits as well as to display devices.

REFERENCES:
patent: 4253756 (1981-03-01), Kurei et al.
patent: 4286849 (1981-09-01), Uchidoi et al.

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