101
f
: Selecting the AF Operation
N
Suited for still subjects. When you
press the shutter button halfway, the
camera will focus only once.
When focus is achieved, the AF point
that achieved focus will be displayed,
and the focus confirmation light <
o
>
in the viewfinder will also light up.
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.
This AF operation is suited 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.
When the AF area selection mode is set to 19-point automatic selection AF
(p.103), the camera first uses the manually-selected AF point to focus. During
autofocusing, if the subject moves away from the manually-selected AF point,
focus tracking continues as long as the subject is covered by the Area AF frame.
One-Shot AF for Still Subjects
Focus confirmation light
AF point
AI Servo AF for Moving Subjects
If focus cannot be achieved, the focus confirmation light <
o
> in the
viewfinder will blink. If this occurs, the picture cannot be taken even if the
shutter button is pressed completely. Recompose the shot and try to
focus again, or see “When Autofocus Fails” (p.109).
If [
z
1: Beep
] is set to [
Disable
], the beeper will not sound when focus is achieved.
After achieving focus with One-Shot AF, you can lock the focus on a subject
and recompose the shot. This is called “focus lock”. This is convenient when
you want to focus on a subject not covered by the Area AF frame.
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 up.
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