Canon EOS 60D - Manual (Page 76)

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You can select the AF mode suiting the shooting conditions or subject.
In Basic Zone modes, the most suitable AF mode is set automatically.
1
On the lens, set the focus mode
switch to <AF>.
2
Set the Mode Dial to a Creative
Zone mode.
3
Press the <f> button. (9)
4
Select the AF mode.
While looking at the LCD panel, turn
the <6> or <5> dial.
X
: One-Shot AF
9 : AI Focus AF
Z : AI Servo AF
Suited for still subjects. When you press the shutter button
halfway, the camera will focus only once.
When focus is achieved, the AF point which achieved focus will flash
briefly in red, and the focus confirmation light <o> in the viewfinder
will also light.
With evaluative metering, the exposure setting will be set at the
same time focus is achieved.
While you hold down the shutter button halfway, the focus will be
locked. You can then recompose the shot if desired.
f : Selecting the AF ModeN
One-Shot AF for Still Subjects