Ai Servo Af For Moving Subjects - Canon EOS Rebel SL2 Basic Instruction Manual

One-Shot AF for Still Subjects
AF point
Focus indicator
While you keep holding down the shutter button halfway, the focus
will be locked. You can then recompose the shot if desired.

AI Servo AF for Moving Subjects

This AF operation is suited for moving subjects when the focusing
distance keeps changing. While you hold down the shutter button
halfway, the camera will keep focusing on the subject
continuously.
The exposure is set at the moment the picture is taken.
When the AF point selection (p.94) is automatic, the camera first
uses the center AF point to focus. During autofocusing, if the subject
moves away from the center AF point, focus tracking continues as
long as the subject is covered by another AF point.
AI Focus AF for Switching the AF Operation Automatically
AI Focus AF switches the AF operation from One-Shot AF to AI
Servo AF automatically if a still subject starts moving.
After the subject is in focus in One-Shot AF, if the subject starts
moving, the camera will detect the movement, change the AF
operation automatically to AI Servo AF, and start tracking the moving
subject.
f: Changing the Autofocus OperationN
Suited for still subjects. When you
press the shutter button halfway, the
camera will focus only once.
The dot inside the AF point achieving
focus lights up briefly in red, and the
focus indicator <o> in the viewfinder
will also light up.
With evaluative metering, the
exposure setting will be set at the
same time focus is achieved.
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