Nikon D1X - Manual (Page 119)

106
AD
V
ANCED PHO
T
OGRAPHY—DEPTH-OF-FIELD PREVIEW
Depth-of-Field Preview
To check depth of field for the current aper ture setting, press and hold the depth-of-
field preview button.
The lens will be stopped down to the aperture selected
by the camera in programmed auto or shutter-priority
auto exposure modes, or to the value selected by the
user in aper ture-priority or manual modes. The view
through the viewfinder provides an approximation of
the depth of field that can be obtained at the current
aper ture setting.