Canon EOS-1D X Af Setting Manualbook page 11

moves from the AF points
subject moves away from the AF points for an
extended period (such as swimmers doing the
butterfly stroke or sports where the subject is
hidden for intervals), even better performance
may be achieved by manually setting the
[Tracking sensitivity] parameter to [-2].
Tr y selec ting Case 2 when
shooting a subject with fast
side to side movement. Even
if it momentarily moves away
from the active AF point, AI
Servo AF resists refocusing on
t h e b a c k g r o u n d o r a n y
obstacle.
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