Nikon D4S Manuel D’Utilisation

337

U

Choose the role played by the Fn button, 
either by itself (Press) or when used in 
combination with the command dials 
(Press + command dials).

❚❚Press

Selecting Press displays the following options:

G button

➜ A Custom Settings menu

q

During viewfinder photography, you can preview 
depth of field while the Fn button is pressed (

0 126). 

During live view photography, you can press the 
button once to open the lens to maximum aperture, 
making it easier to check focus; pressing the button 
again restores aperture to its original value (

r

Press the Fn button to lock flash value (supported 
flash units only, 

0 196, 208). Press again to cancel FV 

lock.

B

Focus and exposure lock while the Fn button is 
pressed.

C

Exposure locks while the Fn button is pressed.

D

Exposure locks when the Fn button is pressed, and 
remains locked until the button is pressed a second 
time, the shutter is released, or the standby timer 
expires.

E

Exposure locks when the Fn button is pressed, and 
remains locked until the button is pressed a second 
time or the standby timer expires.

F

Focus locks while the Fn button is pressed.

A

Pressing the Fn button initiates autofocus.