Owner's Manual

B The AF-ON Button
For the purpose of focusing the camera, pressing
the AF-ON button has the same effect as pressing
the shutter-release button halfway.
AF-ON button
Pal Predictive Focus Tracking
In continuous-servo AF, the camera will initiate predictive focus tracking if
the subject moves toward or away from the camera while the shutter-
release
button is pressed halfway or the AF-ON button is pressed. This
allows
the camera to track focus while attempting to predict where the
subject will be when the shutter is released.
B SeeAlso
For information on using focus priority in continuous-servo AF, see
Custom Setting a1 ([AF-C priority selection], pg. 267). For information on
using release
priority in continuous-servo AF, see Custom Setting a2 ([AF-S
priority selection], pg. 268). For information on preventing the camera
from focusing when the shutter-release button is pressed halfway, see
Custom Setting as ([AF activation], pg. 271).
63