Nikon D3x Mode D'Emploi

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AF-Area Mode
AF-area mode determines how the 
focus point is selected in autofocus 
mode (pg. 74). To select the AF-
area mode, rotate the AF-area 
mode selector. The following 
options are available:
Mode
Description
K
Single-point 
AF
User selects focus point manually; camera focuses on 
subject in selected focus point only.
 
Use for relatively 
static compositions with subjects that will stay in selected 
focus point.
I
Dynamic-
area AF
• In continuous-servo AF (pg. 74), user selects focus point 
manually; if subject briefly leaves selected focus point, 
camera will focus based on information from 
surrounding points. Number of focus points used can 
be selected from 9, 21, and 51 using Custom Setting a3 
([Dynamic AF area], pg. 307). If [51 points (3D-tracking)] 
is selected for Custom Setting a3, focus point will be 
selected automatically using 3D-tracking.
• In single-servo AF (pg. 74), user selects focus point 
manually; camera focuses on subject in selected focus 
point only.
H
Auto-area AF
Camera automatically detects 
subject and selects focus point.
 
If 
type G or D lens is used, camera 
can distinguish human subjects 
from background for improved 
subject detection. In single-servo 
AF, active focus points are 
highlighted for about one second after camera focuses. 
Active focus points are not displayed in continuous-servo 
AF.
AF-area mode selector