Patent
1987-12-31
1989-07-04
Adams, Russell E.
35419512, G03B 300
Patent
active
048455210
ABSTRACT:
An auto-focus apparatus in a camera having an auto-focusing mode and a manual focusing mode. A circuit determines when the auto-focusing mode cannot be carried out and automatically enables the manual focusing mode. When auto-focusing can again be accomplished, the focusing mode is automatically switched back to auto-focus. Circuitry is provided for prohibiting the switch back to auto-focus mode if it is detected that a manual focus operation has begun. Preferably, an indication control circuit is also provided to cancel an auto-focus indication when the manual focus operation has been detected.
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patent: 4459006 (1984-07-01), Sakai et al.
patent: 4572643 (1986-02-01), Akashi
patent: 4617459 (1986-10-01), Akashi et al.
Adams Russell E.
Canon Kabushiki Kaisha
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