Nikon D3400 Kit Owner's Manual

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The Setup Menu: Camera Setup
Acquire reference data for the Image Dust Off option in 
Capture NX-D (for more information, refer to Capture NX-D 
online help).
Image Dust Off ref photo is available only when a type E or G 
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. To exit 
without acquiring image dust off data, 
press 
G.
The message shown at right will be 
displayed and “rEF” will appear in the 
viewfinder.
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.
Image Dust Off Ref Photo
G button
➜ B setup menu