298 Menu Guide > B The Setup MenuNon-CPU lenses can be attached via a mount adapter (availableseparately). Use Non-CPU lens data to record the focal lengthand maximum aperture of non-CPU lenses, allowing them to beused with on-camera vibration reduction and certain othercamera features.• Lens number: Choose a number to identify the lens.• Focal length (mm): Enter the lens focal length.• Maximum aperture: Enter the maximum aperture.Dirt or dust entering the camera when lenses are exchanged orthe body cap is removed may adhere to the image sensor andaffect your photographs. The Clean image sensor optionvibrates the sensor to remove dust.Non-CPU Lens DataG button ➜ B (setup menu)Clean Image SensorG button ➜ B (setup menu)Option DescriptionClean now Perform image sensor cleaning immediately.Automaticcleaning• Clean at shutdown: The image sensor is automaticallycleaned during shutdown each time the camera is turnedoff.• Cleaning off: Automatic image sensor cleaning off.
