Nikon COOLPIX P900 Reference Manual - Page 784

D Foreign Matter on the Image Sensor Foreign matter entering the camera when lenses or body caps are removed or exchanged (or in rare circumstances lubricant or fine particles from the camera itself) may adhere to the image sensor, where it may appear in photographs taken under certain conditions. To prevent entry of foreign matter when attaching the body cap or exchanging lenses, avoid dusty environments and be sure to remove all dust and other foreign matter that may be adhering to the camera mount, lens mount, or body cap. To protect the camera when no lens is in place, be sure to replace the supplied body cap. Should you encounter foreign matter that cannot be removed using the image sensor cleaning option (0739), clean the image sensor as described in "Manual Cleaning" (0741), or have the sensor cleaned by authorized Nikon service personnel. Photographs affected by the presence of foreign matter on the sensor can be retouched using the clean image options available in some imaging applications. D Servicing the Camera and Accessories The camera is a precision device and requires regular servicing; Nikon recommends that the camera be inspected once every one to two years, and that it be serviced once every three to five years (note that fees apply to these services). • Frequent inspection and servicing are particularly recommended if the camera is used professionally. • Any accessories regularly used with the camera, such as lenses or optional flash units, should be included when the camera is inspected or serviced. 742 Caring for the Camera