Nikon D300 User Manual page 403

Note: The camera's user's manual has information for these
assignments on pages 292–296 for D300S and 303–307 for
D300.
Selected button
▪ Preview** – Normally, the depth-of-field function is
controlled by the
users may not like the location of the
preview
configurable—decide to switch the
(for instance) with the
Then, when
Settings, the
field preview instead. Setting this function disables other
functionality in the D300(S). Please see the** note at the
end of this section.
▪ FV lock** – If you set Selected button to
button will cause the built-in Speedlight or the external
Speedlight to emit a monitor pre-flash and then lock the
flash output to the level determined by the pre-flash until
you press the Selected button a second time. Setting this
function disables other functionality in the D300(S).
Please see the** note at the end of this section.
▪ AE/AF lock – Enabling this function causes
(exposure) and
autofocus system reading while the Selected button is
held down.
▪ AE lock only – This allows you to lock
on the last meter reading when you hold down the
Selected button.
press
Depth-of-field preview
button and—since
Depth-of-field preview
Preview is selected in one of these
Fn (FUNC) button
AF (focus) to lock on the last meter and
403
button. Some
Depth-of-field
it is
Fn (FUNC.)
will activate depth of
FV lock, the
AE (exposure)
also
button
button.
Custom
AE