Ai Servo Af For Moving Subjects - Canon EOS 7D Instruction Manual

One-Shot AF for Still Subjects
AF point
Focus confirmation light
While you hold down the shutter button halfway, the focus will be

locked. You can then recompose the shot if desired.
In the d/s/f/a/F shooting modes, AF is also possible by

pressing the <p> button.
If focus cannot be achieved, the focus confirmation light <o> in the

viewfinder will blink. If this occurs, a picture cannot be taken even if the
shutter button is pressed completely. Recompose the picture and try to
focus again. Or see "When Autofocus Fails" (p.96).
If the [1 Beep] menu is set to [Off], the beeper will not sound when

focus is achieved.

AI Servo AF for Moving Subjects

This AF mode is for moving subjects when the focusing distance
keeps changing. While you hold down the shutter button halfway,
the subject will be focused continuously.
The exposure is set at the moment the picture is taken.

In the d/s/f/a/F shooting modes, AF is also possible by

pressing the <p> button.
With AI Servo AF, the beeper will not sound even when focus is achieved.
Also, the focus confirmation light <o> in the viewfinder will not light.
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 be
displayed, 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.
f: Selecting the AF ModeN
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