Nikon Camera F3AF - Manual (Page 47)

The shutter speed dial @ has the following settings:
A (Auto); Provides aperture-priority automatic exposure con­
trol in which you first select the shooting aperture, then the
camera sets the corresponding shutter speed for correct
exposure.
1/2000~8 sec.: 15 discrete settings give you full manual con­
trol of the shutter speed. The numbers engraved on the dial in
white are reciprocals, for example 2000 means 1/2000 sec. 60,
also a reciprocal, appears in red and indicates the highest
manual shutter speed for proper synchronization with electronic
flash (with the exception of X). Numbers engraved in orange
represent actual shutter speeds, for example an orange 8
means 8 sec.
B (Bulb): The shutter remains open as long as the shutter re­
lease button ® is depressed.