Af Area Selection Modes - Canon EOS 70 Instruction Manual

AF Area Selection Modes
The AF areas are explained starting with the smallest one.
"
(1) Spot AF (Manual selection)
C.Fn III -6
Although this is the same as single-point AF, the
selected AF point
<
0
>
covers a smaller pinpoint
area to focus. Effective for pinpoint focusing
overlapping subjects such as an animal in a cage.
Since Spot AF covers a very small area, focusing
might be difficult during hand-held shooting or for a
moving subject.
(2) Single-point AF (Manual selection)
Select one AF point <
0>
to be used to focus.
I
(3) AF point expansion (Manual selection)
C.Fn III -6
The manually-selected AF point
<
0
>
and adjacent AF points
<
D
>
are
used to focus. Effective when it is difficult to track a moving subject with
just one AF point.
With AI Servo AF, the manually-selected AF point
<
0
>
must focus-
track the subject first. However, it is easier to focus the target subject
than with Zone AF.
With One-Shot AF, when focus is achieved with the expanded AF point,
the expanded AF point
<
0
>
will also be displayed along with the
manually-selected AF point
<
0>.
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