Interchangeable lens and camera for use therewith

摘要

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.