Canon EOS DIGITAL REBEL XTI Service Manual page 30

7-4 Focusing point
selection:
7-5 AF point selection
operation:
[AI Focus AF (Automatic switching between One-Shot/
Predictive AI Servo AF)]
When the AF point which achieved focus in the One-Shot AF
mode detects subject movement, the AI Servo AF mode takes
over.
⑴Automatically set in the Full Auto and No Flash modes.
⑵ In the Basic Zone and Creative Zone modes, the beeper
will sound when AI SERVO AF operates during the AI
Focus AF mode.
2)Manual focus (MF)
After the lens focus mode is switched to MF, manual focusing
is enabled with the focusing ring.
⑴ When focus is achieved, the focus confirmation icon and
superimposed display lights up.
⑵ During automatic AF point selection, all
activated. During manual AF point selection, the selected
AF point is activated.
⑶ During continuous shooting, electronic ring manual
focusing is enabled during the exposure.
1)Automatic selection
The camera selects the AF point automatically and focuses
the subject.
⑴One-Shot AF
One of the nine AF points
focus the optimum subject.
⑵AI SERVO AF
At the start of focusing, the center AF point focuses the
subject. AI Servo AF continues even if the subject later
moves away from the center AF point to another AF point.
⑶Normally, it focuses the closest subject.
⑷ When the AF point selection is automatic, multiple AF
points within the in-focus range will light up.
⑸Automatically set in the Basic Zone modes and A-DEP.
2)Manual AF point selection
Focuses with one, user-selected AF point.
・Settable in the Creative Zone modes (except A-DEP).
After pressing the AF point selection button, select the AF
point with the cross keys or main dial.
・ If C.Fn-1-4 has been set, the AF point can be selected directly
with the cross keys while the exposure metering is active.
(Press the AF point selection button to set automatic AF point
selection, press the SET button to select the center AF point,
or press the cross keys to select the top, bottom, left, or right
AF point.
25
General Information
nine AF points
is selected automatically to
are