Canon EOS R, Руководство для продвинутых пользователей

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Customizing AF Functions
z
Acceleration/deceleration tracking
Sets the Servo AF tracking sensitivity for
subjects that change speed suddenly, as
by suddenly moving or stopping.
0
Suited for subjects that move at a steady speed (minor changes
in moving speed).
-2 / -1
Suited for subjects that move at a steady speed (minor changes
in moving speed). Effective when a setting of 0 makes focus
unstable, due to slight subject movement or an obstruction in
front of the subject.
+2 / +1
Effective for subjects having sudden movements, sudden
acceleration/deceleration, or sudden stops. Even if the moving
subject’s speed suddenly changes dramatically, the camera
continues to focus on the target subject. For example, the
camera is less likely to focus behind a subject that suddenly
starts approaching you, or in front of an approaching subject that
suddenly stops moving. S2 can track dramatic changes in
the moving subject’s speed better than with +1.
However, since the camera will be sensitive to even slight
movements of the subject, focusing may become unstable for
short periods.