Af Area Selection Modes - Canon EOS-1DX Instruction Manual

AF Area Selection Modes

Single-point Spot AF (Manual selection)
Single-point AF (Manual selection)
AF point expansion (Manual selection
The manually-selected AF point <S> and adjacent AF points <w>
(above, below, on the left and on the right) 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 <S> 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 an expanded AF point,
the expanded AF point <S> will also be displayed along with the
manually-selected AF point <S>.
Although this is the same as Single-point AF
(manual selection), the selected AF point <O>
covers a smaller area to focus. Effective for
pinpoint focusing of overlapping subjects such as
an animal in a cage.
Since Single-point Spot AF (manual selection)
covers a very small area, focusing may be difficult
during hand-held shooting or for a moving subject.
Select one AF point <S> to be used for focusing.
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