174 Menu Guide2 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 theviewfinder and then press the shutter-release buttonhalfway.In autofocus mode, focus will automatically be set to infinity;in manual focus mode, set focus to infinity manually.3 Acquire dust off reference data.Press the shutter-release button the rest of the way down toacquire Image Dust Off reference data. The monitor turns offwhen the shutter-release button is pressed.If the reference object is too bright ortoo dark, the camera may be unableto acquire Image Dust Off referencedata and a message will be displayed.Choose another reference object andrepeat the process from Step 1.
