Nikon D3300 Kit オーナーマニュアル

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Choosing How the Focus Point Is Selected: 
AF-Area Mode
Choose how the focus point for autofocus is selected. Note that 
d (Dynamic-area AF) and f (3D-tracking (11 points)) AF-
area modes are not available when AF-S is selected for focus 
mode.
Option
Description
c
Single-point 
AF 
For stationary subjects. Focus point is selected 
manually; camera focuses on subject in selected 
focus point only.
d
Dynamic-area 
AF
For non-stationary subjects. In AF-A and AF-C focus 
modes
, user selects focus point using multi 
selector (
0 80), but camera will focus based on 
information from surrounding focus points if 
subject briefly leaves selected point. 
f
3D-tracking 
(11 points)
In AF-A and AF-C focus modes
, user selects focus point 
using multi selector (
0 80). If subject moves 
after camera has focused, camera uses 3D-
tracking to select new focus point and keep 
focus locked on original subject while shutter-
release button is pressed halfway.
Auto-area AF
Camera automatically detects subject and 
selects focus point.