Nikon 25432 User Manual - Page 346

1 Choose a start option. Highlight one of the following options and press J. To exit without acquiring image dust off data, press G. • [Start]: The message shown at right will be displayed and "rEF" will appear in the viewfinder and control panel displays. • [Clean sensor and then start]: Select this option to clean the image sensor before starting. The message shown at right will be displayed and "rEF" will appear in the viewfinder and control panel displays when cleaning is complete. D Image Sensor Cleaning If the pictures that will be used with Image Dust Off have already been recorded, do NOT perform image sensor cleaning before acquiring dust off reference data. If image sensor cleaning is performed after the pictures are taken but before dust reference data are acquired, Image Dust Off will be unable to locate dust and remove its effects. 2 Frame a featureless white object in the viewfinder. With the lens about ten centimeters (four inches) from a well- lit, featureless white object, frame the object so that it fills the U viewfinder and then press the shutter-release button halfway. In autofocus mode, focus will automatically be set to infinity; in manual focus mode, set focus to infinity manually. 320