Lens barrel for both priorities or shutter speed priority mode a

Details Lens barrel for both priorities or shutter speed priority mode a Lens barrel for both priorities or shutter speed priority mode a

1979-09-07

1981-05-26

Hix, L. T.

G03B 1700

Patent

active

042694973

ABSTRACT:
This invention relates particularly to a phototaking lens having at least a shutter speed priority automatic exposure system. The lens has a mount engageable with a mount of a camera body, which has a signal member operable when the lens is mounted and control means for making a caution and/or for stopping camera operation in response to an output of the signal member. The lens is further equipped with means for presenting the operation of the signal member, this means being disposed on the lens mount facing the signal member as the mount of the lens is engaged with the mount of the camera body. The signal member includes a retractable signal pin projected from the mount of the camera body and the preventing means includes a recess on the mount of the lens which is acceptable to the signal pin.

REFERENCES:
patent: 3782261 (1974-01-01), Araki

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