Canon EOS-1DX Af Setting Manualbook page 40

far side of the field. In many cases when photographing
such a scene, another athlete moves across the
foreground when the subject you are aiming for is
experiencing relatively minor changes in speed (the
relative speed changes become more significant when
the shooting distance is closer). In such a situation, [-1/2]
is more effective than a setting of [0] for foreground
obstructions.
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