99
A
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.
A
Predictive Focus Tracking
In
AF-C
mode, 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.
A
See Also
For information on:
•
Using focus priority in continuous-servo AF, see
A
> Custom Setting
a1 (
AF-C priority selection
260).
•
Using release priority in single-servo AF, see
A
> Custom Setting a2
(
AF-S priority selection
•
Preventing the camera from focusing when the shutter-release
button is pressed halfway, see
A
> Custom Setting a8 (
AF activation
,
•
Limiting focus-mode selection to
AF-S
or
AF-C
, see
A
> Custom Setting
a10 (
Autofocus mode restrictions
,
•
Using the sub-command dial to choose the focus mode, see
A
>
Custom Setting f4 (
Customize command dials
) >
Change main/sub
(
269).
•
The autofocus options available in live view or during movie
recording, see “Autofocus” (
AF-ON
button
Summary of Contents for D850
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