Canon EOS 7 - Manual (Page 43)

Selecting the AF Mode
0
Press the shutter button halfway
to start the AF operation. Focus
will then be achieved once.
► The focusing point which achieves
focus flashes briefly and the in-focus
indicator <•> lights.
• When focus is achieved, the
exposure setting (shutter speed and
aperture) is set at the same time. The
exposure setting and focus are
locked while you keep pressing the
shutter button halfway. You can then
recompose the shot while
maintaining the lock, (-»page 47)
If focus cannot be achieved, the in-focus indicator <•> in the viewfinder will
blink. In this condition, you cannot take a picture even when you press the
shutter button completely. Recompose the shot and focus again. See also
“When Autofocus Fails" on page 48.
AI Servo AF for Moving Subjects
i
The camera focuses continuously
while you keep pressing the
shutter button halfway.
• This AF mode suits moving subjects
when the focusing distance keeps
changing.
With predictive AF (^page 44), the
camera can also focus track a
subject which steadily approaches or
retreats from the camera.
► The exposure setting is set when the
picture is taken.
In this mode, the in-focus indicator does not light and the beeper does not
sound even when focus is achieved.
If the in-focus indicator blinks, it means that locus has not been achieved.
The focus cannot be locked, (-^page 47)
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