Nikon D300 User Manual page 73

al O: AF-On for MB-D10
Choose the function assigned to
the AF-ON button on the optional
MB-D10 battery pack.
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Description
AF-ON Pressing the MB-DIO AF-ON button initiates
(default) autofocus.
Focus and exposure lock while the MB-DIO AF-ON
I_ AE/AF lock
button is pressed.
Exposure locks while the MB-DIO AF-ON button is
!_ AE Iockonly )ressed.
Exposure locks when the MB-DIO AF-ON button is
!_ AE lock (Reset pressed, and remains locked until the button is
on release) pressed a second time, the shutter is released or
the exposure meters turn off.
Exposure locks when the MB-DIO AF-ON button is
pressed, and remains locked until the button is
!_ AE lock (Hold) pressed a second time or the exposure meters turn
off.
Focus locks while the MB-DIO AF-ONbutton is
AF lock only )ressed.
Same as The MB-DIO AF-ON button performs the function
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FUNC. button selected for Custom Setting f4 (pg. 302).
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