Canon EOS 5D MARK IV Instruction Manual page 131

Case 3: Instantly focus on subjects suddenly entering AF points
Default settings
• Tracking sensitivity: Responsive:
+1
• Accel./decel. tracking: +1
• AF pt auto switching: 0
If you want to quickly focus on a subject appearing suddenly, setting
[Tracking sensitivity] to [+2] may give better results (p.132).
Case 4: For subjects that accelerate or decelerate quickly
Default settings
• Tracking sensitivity: 0
• Accel./decel. tracking: +1
• AF pt auto switching: 0
If the subject is in motion, and prone to sudden, dramatic changes in speed,
setting [Accel./decel. tracking] to [+2] may give better results (p.133).
3 Selecting AI Servo AF CharacteristicsN
Once an AF point starts tracking the
subject, this setting enables the camera
to consecutively focus on subjects at
different distances. If a new subject
appears in front of the target subject, the
camera will start focusing on the new
subject. Also effective when you want to
always focus on the closest subject.
Geared for tracking moving subjects
whose speed can change dramatically
and suddenly.
Effective for subjects having sudden
movements, sudden acceleration,
sudden deceleration, or sudden stops.
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