Nikon D300 User Manual (en)

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62
N
Focus Mode
Focus mode is controlled by the 
focus-mode selector on the front of 
the camera. There are two 
autofocus (AF) modes, in which the 
camera focuses automatically 
when the shutter-release button is 
pressed halfway, and one manual 
focus
 mode, in which focus must be adjusted manually using the 
focusing ring on the lens:
Choose single-servo AF for landscapes and other stationary sub-
jects.  Continuous-servo AF may be a better choice with erratically-
moving subjects.  Manual focus is recommended when the camera
is unable to focus using autofocus.
Option
Description
S
Single-servo 
AF
Camera focuses when shutter-release button is pressed 
halfway. Focus locks when in-focus indicator (
I) appears 
in viewfinder, and remains locked while shutter-release 
button is pressed halfway (focus lock).
 
At default settings, 
shutter can only be released when in-focus indicator is 
displayed (focus priority).
C
Continuous-
servo AF
Camera focuses continuously while shutter-release button 
is pressed halfway.
 
If subject moves, camera will engage 
predictive focus tracking (pg. 63) 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).
M
Manual
(pg. 71)
Camera does not focus automatically; focus must be 
adjusted manually using the lens focusing ring.
 
If 
maximum aperture of lens is f/5.6 or faster, viewfinder 
focus indicator can be used to confirm focus (electronic 
range finding
; pg. 72), but photographs can be taken at any 
time, whether or not subject is in focus.
Focus-mode selector