Nikon D4 User Manual
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Keeping the Camera Level: Virtual Horizon
Roll and pitch data from the camera tilt sensor can be dis-
played for assistance in levelling the camera on a tripod 
and in other similar situations.
The Monitor
The Monitor
The Virtual horizon option in the setup menu is used to 
display a virtual horizon in the monitor. The roll reference 
line turns green if the camera is tilted neither left nor right, 
while the pitch reference line turns green and a dot ap-
pears in the center of the display if the camera is tilted nei-
ther forward nor back. Each division is equivalent to 5°.
Camera level
Camera tilted left
or right
Camera tilted
forward or back
In live view, you can display a virtual 
horizon over the view in the monitor by 
pressing the 
R button.
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Taking Photographs
Tilt
The displays may not be accurate when the camera is tilted 
at a sharp angle forward or back. Tilt will not be displayed if 
the camera is unable to measure it.