Olympus LC-63A Lens Cap for XZ-1 and XZ-2 Digital Camera Automatic Opening Mechanism: The LC-63A Lens Cap opens and closes automatically with the push of the cameras' ON/OFF button. The lens cap's four shutters open smoothly as the camera's lens extends forward and close precisely as the lens retracts when turned off Mount: The cap screw-mounts to the lens' filter thread and stays on the camera all the time. The screw mount keeps the cap tight and secure throughout multiple openings and closings