Nikon D3100, User Manual

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More on Photography (All Modes)
This section describes the focus options available when photographs are framed in
the viewfinder. Focus can be adjusted automatically or manually (see “Focus Mode,”
below). The user can also select the focus point for automatic or manual focus (
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62)
or use focus lock to focus to recompose photographs after focusing (
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60).
Focus Mode
Choose from the following focus modes. Note that
AF-S
and
AF-C
are available only in
modes
P
,
S
,
A
, and
M.
1
Place the cursor in the information display.
If shooting information is not displayed in the monitor, press the
P
button.
Press the
P
button again to place the cursor in the information display.
2
Display focus-mode options.
Highlight the current focus mode in the
information display and press
J
.
Focus
Option Description
AF-A
Auto-servo
AF
Camera automatically selects single-servo autofocus if subject is
stationary, continuous-servo autofocus if subject is moving. Shutter can
only be released if camera is able to focus.
AF-S
Single-servo
AF For stationary subjects. Focus locks when shutter-release button is
pressed halfway. Shutter can only be released if camera is able to focus.
AF-C
Continuous-
servo AF
For moving subjects. Camera focuses continuously while shutter-
release button is pressed halfway. Shutter can only be released if
camera is able to focus.
MF
Manual focus Focus manually (
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62).
Information display
P
button