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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
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.
3 Acquire dust off reference data.
Press the shutter-release button the rest of the way down to
acquire Image Dust Off reference data.
The monitor turns off
when the shutter-release button is pressed.
If the reference object is too bright or too
dark, the camera may be unable to
acquire Image Dust Off reference data
and the message shown at right will be
displayed.
Choose another reference
object and repeat the process from
step 1.
D Image Dust Off Reference Data
The same reference data can be used for
photographs taken with different lenses or at
different apertures.
Reference images can not
be viewed using computer imaging software.
A
grid pattern is displayed when reference images
are viewed on the camera.