Nikon D800 User Manual (en)

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Focus and Shoot
1
Press the shutter-
release button 
halfway (
At default settings, the 
camera will focus on the 
subject in the center 
focus point. Frame a 
photo in the viewfinder 
with the main subject 
positioned in the center 
focus point and press 
the shutter-release button halfway. If the subject is poorly lit, 
the AF-assist illuminator may light.
2
Check indicators in the viewfinder.
When the focus operation is complete, the in-focus indicator 
(
I) will appear in the viewfinder. 
While the shutter-release button is pressed halfway, 
focus will lock and the number of exposures that 
can be stored in the memory buffer (“t”; 
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” 
(
Viewfinder display
Description
I
Subject in focus.
2
Focus point is between camera and subject.
4
Focus point is behind subject.
2 4 
(blinks)
Camera unable to focus on subject in focus 
point using autofocus.
Focus 
indicator
Buffer 
capacity
Focus point