Abstract: A lens barrel includes an optical lens unit, a manual operation member for manually moving the optical lens unit in an optical axis direction, a motor member for driving the optical lens unit in the optical axis direction, a motor operation member for actuating the motor member, the motor operation member being arranged to output a signal relating to an operation of the motor operation member, and the motor member being arranged to be driven according to the signal, a transmission mechanism capable of driving the optical lens unit in the optical axis direction by concurrently transmitting an operation force of the manual operation member and a driving force of the motor member to the optical lens unit, and a setting member for setting the motor member into an inoperative state.

Abstract: A lens barrel includes an optical lens unit, a manual operation member for manually moving the optical lens unit in an optical axis direction, a motor member for driving the optical lens unit in the optical axis direction, a motor operation member for actuating the motor member, the motor operation member being arranged to output a signal relating to an operation of the motor operation member, and the motor member being arranged to be driven according to the signal, a transmission mechanism capable of driving the optical lens unit in the optical axis direction by concurrently transmitting an operation force of the manual operation member and a driving force of the motor member to the optical lens unit, and a setting member for setting the motor member into an inoperative state.

Abstract: This specification discloses a lens position control device in which the focusing lens of a zoom lens is moved on the basis of the output signal of image pickup means provided on the image plane of the zoom lens to thereby effect focus adjustment and which achieves flange back adjustment in such a manner as to change the reference position of a wobbling lens wobbling back and forth in the direction of an optical axis having a predetermined position as the reference in order to detect the focus state, and the automatization of the flange back adjustment.

Abstract: An objective lens for application to an image apparatus of which the size of the image pickup surface is changeable over between a first mode of a first aspect ratio and a second mode of a second aspect ratio has first optical member for extending the focal length of the objective lens, second optical member for shrinking the focal length of the objective lens, an operating member, and a transmitting mechanism for transmitting the operating force of the operating member to the first optical member under the first mode, and transmitting the operating force to the first and second optical member under the second mode, and by the operation of the operating member, under the first mode, the first optical member is removably insertable into the optical path of the objective lens, and under the second mode, the first and second optical member are removably insertable into the optical path of the objective lens.

Abstract: A zoom lens barrel includes a first and a second lens units simultaneously shifting for zooming along an optical axis; a fixed lens barrel for housing the first and second lens units; a first cam groove formed in the fixed lens barrel so as to control the shift of the first lens unit; and a second cam groove formed in the fixed lens barrel so as to control the shift of the second lens unit.