Pentax 26755 Operation Manual - Page 16

14 * If your camera has a KAF2 mount, you can still switch between autofocus and manual focus with the lens focusing ring even when the camera has been set to autofocus. * If you have a camera (such as the SF-series) having a KAF mount, set both the camera and lens focus mode switch to the same setting. If the camera is set to autofocus [AF single] and the lens is set to manual focus, you cannot take a picture until the camera's focus indicator lights. * If you use a camera which does not have autofocus, focus manually. * The telephoto lens' focusing ring stops turning at slightly past the ∞ infinity symbol. This is because, the point of focus changes depending on the temperature, and sometimes the focus is achieved beyond the ∞ infinity symbol. * Even when focusing at infinity, always look through the viewfinder to make sure the subject is in focus. * When the lens is set for manual focus, the focusing ring can continue to turn even past the minimum focusing distance or infinity mark.