lens l6 back lid 17 contact component 19 and mount 16 this prevents the noise generated by the mirror up or shutter operation when the lens barrel is mounted on the camera body and photographing is carried out from propagating through both mounts of the camera and lens and in the air up to sensors 21 therefore it can prevent the sensors 21 from outputting error signals due to noise numeral 18 indicates a package component comprised of a flexible print board for controlling the drive of the aforementioned aperture unit 7 and fluctuation correction unit 5 which is bonded to a polygon substrate holding table 18a by double sided tape and it is fixed to the outer periphery of the small diameter portion of the fixed barrel 1 by screw a connection portion 18b extends backward from the package component 18 to be electrically connected to a contact component 19 for communication with the camera body the power is supplied through the contact component 19 and the connection portion 18b for the drive of the aperture unit 7 and fluctuation correction unit 5 and also the power for the control circuit symbol 7a represents a flexible print board for electrically connecting the aperture unit 7 with.