Nikon D300 - Manual (Page 216)

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t
3
Choose a start time.
Press 4 or 2 to highlight hours
or minutes; press 1 or 3 to
change. The starting time is
not displayed if [Now] is
selected for [Choose start
time].
4
Choose an interval.
Press 4 or 2 to highlight
hours, minutes, or seconds;
press
1 or 3 to change. Note
that the camera will not be
able to take photographs at
the specified interval if it is shorter than the shutter speed or
the time required to record images.