Canon EOS-1DX Af Setting Manualbook page 27

automatically switches to other AF points that contain
the subject. As a result, even when the subject
continuously leaves the selected AF point, it is possible
to increase the ratio of photos that are in focus. This
setting is most effective when shooting subjects with
erratic movement such as figure skating, skateboarding,
and inline skating.
Case 5
Photo
View large
image by
touching
Using Case 5 when photographing a figure skater
making a big jump (the AF area selection mode is set to
[AF point expansion]). It is possible to track the skater's
movements by letting the camera switch between AF
points.
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