Owner's Manual

71More on Photography
2 Choose a focus mode.
Highlight a focus mode and press J.
Viewfinder photography Live view
A Predictive Focus Tracking
In AF-C mode or when continuous-servo autofocus is selected in AF-A
mode during viewfinder photography, the camera will initiate
predictive focus tracking if the subject moves toward the camera while
the shutter-release button is pressed halfway.
This allows the camera
to track focus while attempting to predict where the subject will be
when the shutter is released.
D Continuous-Servo Autofocus
In AF-C mode or when continuous-servo autofocus is selected in AF-A
mode, the camera gives higher priority to focus response (has a wider
focus range) than in AF-S mode, and the shutter may be released before
the in-focus indicator is displayed.