 The viewfinder uses molded aspherical lens elements to reduce size.While there is an electronic connection between camera and lens to transmit data, the lenses have no AF motor and no means to adjust focus on the lens itself; both autofocus and manual focus are driven by a motor in the camera through a mechanical "screwdriver" coupling.The focus dial on the G1 is the dial marked with distances on the far right side of the body, and is also used to select the autofocus mode; on the G2, the focus dial was separated from the focus mode control and moved to the top front edge of the body.