Canon EOS-1DX Af Setting Manualbook page 33

Subject tracking characteristics
[Tracking sensitivity] is the parameter
that can be set to track a subject that
the AF point had been following until a
different subject (or background) got in
the way.
This setting allows obstacles that pass
in front of the subject to be ignored,
as well as focusing on new subjects
Choose any of [Case] and push
sensitivity, then adjust level by pressing
turning .
[Locked on : -]
[Responsive : +]
button for Tracking
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