Lens assembly for automatic focusing cameras

摘要

A lens assembly for an automatic focusing camera having an automatic focusing mode and a manual focusing mode comprises an optical system including a lens group shiftable along an optical axis to perform a focusing operation, a focusing operation member rotatable around the optical axis to shift the lens group along the optical axis to perform the focusing operation, a power drive device for power driving the focusing operation member, a focusing handling member rotatable around the focusing operation member to perform the focusing operation manually, a connection element including a plurality of engaging recesses formed in an outer periphery of the focusing operation member at predetermined intervals in a circumferential direction, and a connecting member shiftable in a radial direction to engage with one of the recesses, the connecting element being adapted to transmit the rotation of the manual focusing handling member to the focusing operation member through the connecting member, and a changing-over device for changing over between a manual focusing mode position where the connecting member is engaged by one of the recesses and an automatic focusing mode position where the connecting member is disengaged from the recess.