Interchangeable lens and camera for use therewith

Details Interchangeable lens and camera for use therewith Interchangeable lens and camera for use therewith

1982-06-25

1983-11-08

Perkey, William B.

354286, 350255, G03B 300, G03B 1700, G02B 711

Patent

active

044138946

ABSTRACT:
An interchangeable lens for a camera is constructed such that as a lens shifting ring for focusing an optical system of the interchangeable lens is shifted to a position for manual focusing, a driven shaft for focusing retracts to be disengaged from a driving shaft inside a camera body with simultaneous connection of a means for transmission of driving force from the lens shifting ring to a lens shifting mechanism. This means for transmitting driving force from the lens shifting ring to the lens shifting mechanism is disconnected as the lens shifting ring is shifted to a position for automatic focusing with resultant engagement of the driven shaft with the driving shaft.
A camera is equipped with a detecting member which is shifted to an operating position as the driving shaft for driving the driven shaft of the mounted interchangeable lens is engaged with the driven shaft and a means for opening and closing an electric circuit for focusing according to shifting of the abovementioned detecting member.

REFERENCES:
patent: 4239357 (1980-12-01), Iida

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