F4: Assign Ae-L/Af-L Button - Nikon D90 User Manual

f4: Assign AE-LIAF-L Button
Choose the role played by the
AE-UAF-l
button. This option is
available in all shooting modes
Option
~
AE/AF lock
(default)
. . . . . .
~
AE lock only
rj;j
AF lock only
~@
AE lock (hold)
am
AF-ON
Ell!
FV lock
Description
i
Focus and exposure lock while the AE-UAF-L button is pressed.
•Exposure locks while the
AE-UAF-L
button is pressed.
...................................................
•Focus locks while the
AE-UAF-L
button is pressed.
Exposurelock$whenthe AE-UAF-Lhuttonispressec{andremains locked. . .
until the button is pressed a second time or the exposure meters turn
off.
The AE-UAF·L button initiates autofocus. The shutter-release button can
not be used to focus.
Press the
AE-L/AF-L
button to lock flash value (built-in flash and SB-900,
SB-800, SB-600, SB-400, and SB-R200 flash units only, pg. 198). Press
again to cancel FV lock.
200