Zone Af - Canon EOS-1DX MARK II Settings Manual

Zone AF

With the [Zone AF] mode, one of nine focusing
zones can be selected, and the AF point is
automatically selected from within that zone.
Effective for focusing upon the
nearest subject within a zone
The selected AF points display in
[Zone AF].
Zone AF differs from [AF point expansion], in which
AF always begins with the middle AF point in a cluster of
points. With [Zone AF], the camera always focuses
upon the nearest subject with recognizable detail and
texture.
In situations where you want to focus on the nearest
part of a large subject, or the nearest among multiple
small subjects, Zone AF may give you the focus coverage
you need. This can be especially true with moving
subjects, in AI Servo AF.
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