A: Autofocus; A1: Af-C Priority Selection - Nikon D3X User Manual

a: Autofocus

a1: AF-C Priority Selection

This option controls whether
photographs can be taken
whenever the shutter-release
button is pressed (release priority)
or only when the camera is in focus
(focus priority) in continuous-servo
AF. To select continuous-servo AF,
rotate the focus mode selector to C.
Option
Release
G
(default)
Release +
E
focus
F Focus
Regardless of the option selected, focus will not lock when the in-
focus indicator (
Photos can be taken whenever the shutter-release
button is pressed.
Photos can be taken even when the camera is not in
focus. In continuous mode, frame rate slows for
improved focus if the subject is dark or low contrast.
Photos can only be taken when the in-focus indicator
(I) is displayed.
) is displayed.
I
Focus mode selector
Description
U
305