Nikon D3 - Manual (Page 377)

351
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Dust off Ref Photo
Acquire reference data for the Image Dust Off option in Capture
NX (available separately; for more information, see the Capture NX
manual).
[Dust off ref photo] is available only when a CPU lens is mounted
on the camera. A lens with a focal length of at least 50 mm is
recommended. When using a zoom lens, zoom all the way in.
1
Select [Start].
Highlight [Start] and press J.
The message shown at right will be
displayed and “rEF” will appear in the
viewfinder and control panel displays.
To exit without acquiring image dust off
data, press
G.
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.