Nikon D3X - Manual (Page 386)

360
U
GPS
Adjust settings for connection to a GPS unit (pg. 221) .
Virtual Horizon
Display a virtual horizon based on
information from the camera orientation
sensor.
D
Tilting the Camera
The virtual horizon display is not accurate when
the camera is tilted at a sharp angle forward or
back.
A
See Also
For information on using the electronic analog exposure displays as a tilt
meter, see Custom Setting f4 ([Assign FUNC. button] > [FUNC. button
press]; pg. 334). For information on displaying a virtual horizon in live
view, see page 99.
Non-CPU Lens Data
By specifying lens data (lens focal length and maximum aperture)
for up to nine non-CPU lenses, the user can gain access to a variety
of CPU lens functions
(pg. 218) .