Canon EOS 5D Mark III Instruction Manual page 90

3 Selecting AI Servo AF Characteristics (For a Subject)N
Case 5: For erratic subjects moving quickly in any direction
Default settings
• Tracking sensitivity: [0]
• Accel./decel. tracking: [0]
• AF pt auto switching: [+1]
If the subject moves erratically up, down, left, or right, setting [AF pt auto
switching] to [+2] may give better results (p.94).
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Even if the target subject moves
dramatically up, down, left, or right, the
AF point will switch automatically to
focus-track the subject. Effective for
shooting subjects that move dramatically
up, down, left, or right. This setting takes
effect when the following AF area
selection modes are set: AF point
expansion (Manual selection
point expansion (Manual selection,
surrounding points), Zone AF (Manual
selection), 61-point automatic selection
AF.
This setting is not available with the
Single-point Spot AF (Manual
selection) and Single-point AF
(Manual selection) modes.
), AF