A8: assign af-on button – Nikon D4S User Manual
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Choose the function performed when the
B button is pressed.
a8: Assign AF-ON Button
G button
➜ A Custom Settings menu
Option
Description
A AF-ON
Pressing the
B button initiates autofocus.
B AE/AF lock
Focus and exposure lock while the
B button is
pressed.
C AE lock only
Exposure locks while the
B button is pressed.
D
AE lock (Reset
on release)
Exposure locks when the
B button is pressed, and
remains locked until the button is pressed a second
time, the shutter is released, or the standby timer
expires.
E AE lock (Hold)
Exposure locks when the
B button is pressed, and
remains locked until the button is pressed a second
time or the standby timer expires.
F AF lock only
Focus locks while the
B button is pressed.
None
No operation is performed when the
B button is
pressed.