Nikon SB-10 Instruction Manual page 10

With the N ikon F2-series camera, a bu i I t-in
selector mechanism controls the speedlight sync
adjustment automatical ly as you change shutter
speeds: simply rotate the shutter-speed dial to
the desired setting slower than 1/ 80 sec . The
red line between 1/ 60 and 1/ 125 indicates 1/ 80
sec. A hot-shoe contact built into the mounting
foot of the 58-10 eliminates the need for a sync
cord, although the unit requires the Flash Unit
Coupler AS-' for use with F2-series cameras .
10
With the Nikon
F,
the sync selector is used to
adjust the camera for use with speed lights. First
set the shutter speed at 1/ 60 sec. or slower.
Then I ift and turn the knurled sync se lector
ring around the shutter-speed dial of the camera
until the FX mark appears in the se lector
window. (The Photomic FTN finder must be
removed to gain access to t he sync selector
ring.) A hot-shoe contact built into the mount-
ing foot of the 58-10 eliminates the need for
a sync cord, a lthough the unit requires the
Flash Unit Coup ler AS-1 for use with the
Nikon F.