1978-12-01
1980-09-09
Gellner, Michael L.
G03B 300
Patent
active
042214750
ABSTRACT:
A camera having an automatic focus adjusting device with an arrangement that permits manual focus adjustment by moving a focus adjusting member to a desired position by means of an operation member when automatic focusing is impossible. The camera includes an automatic focus detecting circuit including a photoelectric light sensor, a photographic lens and a focus adjusting member for holding the photographic lens. The member is movable within a certain determined range for focusing by means of a spring. A latch device for latching the focus adjusting member in a focus adjustment start position is included. The latch device is arranged to release the focus adjusting member from the state of being latched to cause the focus adjusting member to start automatic focusing in response to a shutter release operation. A stop is arranged for stopping the focus adjusting member at the in-focus position in response to the output of the automatic focus detecting circuit. An operation member is provided for adjusting the stop position of the focus adjusting member. Finally, a change-over device is included for releasing the latch device irrespective of the shutter release operation of the camera. The change-over device is shiftable between an automatic focus adjusting position and a manual focus adjusting position.
REFERENCES:
patent: 4154517 (1979-05-01), Tamura et al.
Canon Kabushiki Kaisha
Gellner Michael L.
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