Canon EOS-1D C EOS 1D X Instruction Manual - Page 87

3 Selecting AI Servo AF Characteristics (For a Subject) Case 6: For subjects that change speed and move erratically Default settings • Tracking sensitivity: [0] • Accel./decel. tracking: [+1] • AF pt auto switching: [+1] Geared for tracking moving subjects whose speed can change dramatically and suddenly. Also, if the target subject moves dramatically up, down, left or right and it is difficult to focus, the AF point switches automatically to track the subject. This setting takes effect when the following AF area selection modes are set: AF point expansion (Manual selection ), AF 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. If the speed of the moving subject suddenly changes greatly, setting [Accel./decel. tracking] to [+2] may give better results (p.89). If the subject moves suddenly and erratically up, down, left, or right, setting [AF pt auto switching] to [+2] may give better results (p.90). 87