Nikon D3X User Manual page 177

3
Select direct measurement mode.
Release the WB button briefly and then
press the button until the L icon
starts to flash. A flashing D will also
appear in the top control panel and
viewfinder. At default settings, the
displays will flash for about six
seconds.
4
Measure white balance.
Before the indicators stop flashing, frame the
reference object so that it fills the viewfinder and
press the shutter-release button all the way down. The camera
will measure a value for white balance and store it in preset
d-0. No photograph will be recorded; white balance can be
measured accurately even when the camera is not in focus.
SHOOT
CUSTOM
Top control panel
Rear control panel
Viewfinder
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