Apparatus for the setting of exposure control mode in camera

Details Apparatus for the setting of exposure control mode in camera Apparatus for the setting of exposure control mode in camera

1984-08-07

1985-07-23

Adams, Russell E.

3542891, G03B 708

Patent

active

045305862

ABSTRACT:
A mode-setting apparatus for a camera is selectively operable in various exposure control modes including, in particular, aperture priority mode and shutter speed priority mode. The mode setting apparatus is provided with means for detecting the presetting of aperture value and time value and means for selectively setting aperture priority mode or shutter speed priority mode in accordance with the detection signal from the detecting means. The mode-setting means selects the aperture priority when the aperture value is preset latest by the operator. When the time value is preset latest, the mode setting means selects the shutter speed priority mode. In this manner, one of the automatic exposure control modes is automatically selected and set in the camera as priority mode in response to the manual presetting operation latest done by the operator. When the operator wishes to set the aperture priority mode, it can be made by the operator's presetting the aperture-presetting member to a desired aperture value. When the operator wishes to change over the mode to shutter speed priority mode, it is only required for the operator to change the value of shutter speed to a desired time value by a manual operation of the shutter time-presetting member.

REFERENCES:
patent: 4165929 (1979-08-01), Ito et al.
patent: 4175842 (1979-11-01), Sakurada et al.
patent: 4295716 (1981-10-01), Numata
patent: 4306785 (1981-12-01), Tano et al.
patent: 4365880 (1982-12-01), Kiuchi et al.

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