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Sometimes when the subject moves from the selected
AF point, focus can shift to the background (resulting in
an out of focus subject), similarly when an obstacle
obscures the subject, focus can shift to the obstacle. By
selecting Case 2 in situations like these, focus will
attempt to continue to track the desired subject. When a
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].
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Try selecting Case 2 when shooting a tennis player with
fast side to side movement. The subject will be tracked
even when they move away from the AF points.
Photo
Case 2
