Auto-focus single lens reflex camera

Details Auto-focus single lens reflex camera Auto-focus single lens reflex camera

1987-02-02

1988-02-09

Perkey, W. B.

G03B 300

Patent

active

047244542

ABSTRACT:
An auto-focus single-lens reflex camera in which manual focusing can be conducted using a manual focusing member provided on the focusing lens (7), in addition to the switching over of the operation mode between auto-focusing and manual focusing, by providing means for judging whether the amount of shift of the position of a point at which the image of the subject is formed is within a focused range, the amount of shift being detected in the camera body in the auto-focusing mode, and by engaging a normally disengaged lens side drive means (2,3,4,5) and camera side autofocus drive means (8,9,10,11,13) through a clutch member (14) controlled by the judging means, with the autofocus drive means being engaged with the lens drive means only when it is necessary to drive the autofocus motor, a compression spring (12) normally disengaging the camera side drive means from the lens side drive means until the clutch is enabled to overcome the resilient force.

REFERENCES:
patent: 4156567 (1979-05-01), Ostrowski
patent: 4160590 (1979-07-01), Reynard
patent: 4449807 (1984-05-01), Miki et al.
patent: 4575210 (1986-03-01), Yamada et al.
patent: 4627699 (1986-12-01), Takagi

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