Nikon D300 - 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 press
▪ Preview** – Normally, the depth-of-field function is
controlled by the Depth-of-field preview button. Some
users may not like the location of the Depth-of-field
preview button and—since it is also
configurable—decide to switch the Fn (FUNC.) button
(for instance) with the Depth-of-field preview button.
Then, when Preview is selected in one of these Custom
Settings, the Fn (FUNC) button will activate depth of
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 FV lock, the
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 AE
(exposure) and AF (focus) to lock on the last meter and
autofocus system reading while the Selected button is
held down.
▪ AE lock only – This allows you to lock AE (exposure)
on the last meter reading when you hold down the
Selected button.
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