Nikon 13187 User Guide (en)

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Focus
This section describes the focus options available when photographs are framed in 
the viewfinder. Focus can be adjusted automatically (see below) or manually 
(
0 103). The user can also select the focus point for automatic or manual focus 
(
0 101) or use focus lock to focus to recompose photographs after focusing (0 102).
To use autofocus, rotate the focus-mode selector to AF.
Autofocus Mode
Choose from the following autofocus modes:
Autofocus
Mode
Description 
AF-A
Auto-servo AF
: Camera automatically selects single-servo autofocus if subject is stationary, 
continuous-servo autofocus if subject is moving.
AF-S
Single-servo AF
: For stationary subjects. Focus locks when shutter-release button is pressed 
halfway. At default settings, shutter can only be released when in-focus indicator is 
displayed (focus priority
AF-C
Continuous-servo AF
: For moving subjects. Camera focuses continuously while shutter-
release button is pressed halfway; if subject moves, camera will engage predictive focus 
tracking
 (
0 100) to predict final distance to subject and adjust focus as necessary. At 
default settings, shutter can be released whether or not subject is in focus (release 
priority
A
Predictive Focus Tracking
In AF-C mode or when continuous-servo autofocus is selected in AF-A mode, the camera will 
initiate predictive focus tracking if the subject moves toward or away from the camera while 
the shutter-release button is pressed halfway.
 
This allows the camera to track focus while 
attempting to predict where the subject will be when the shutter is released.
Focus-mode selector