Nikon D700 User Manual page 79

Focus and Shoot
1
Press the shutter-
release button
halfway to focus
(pg. 54).
At default settings, the
camera will focus on the
subject in the center Focus Buffer
focus point. Frame a indicator capacity
photo in the viewfinder
with the main subject positioned in the center focus point and
press the shutter-release button halfway. If the camera is able
to focus, a beep will sound and the in-focus indicator (O) will
appear in the viewfinder. If the subject is dark, the AF-assist
illuminator may light automatically to assist the focus
operation.
While the shutter-release button is pressed halfway,
focus will lock and the number of exposures that
can be stored in the memory buffer ("_°"; pg. 87) will
be shown in the viewfinder display.
For information on what to do if the camera is unable to focus
using autofocus, see "Getting Good Results with Autofocus"
(pg. 80).
53