HOW TO CONFIGURE Nikon AUTOFP high speed sync of your flash by Gary Fong
Gary Fong shows step-by-step how to activate the High Speed Sync functionality on Nikon DSLR's. High speed sync allows you to shoot flash at speeds up to 1/8000 sec rather than the mechanical shutter speed limit of 1/250 sec.
This works only on compatible models listed here:
Flashes: Nikon SB-600/700/800/900,
Bodies: Nikon D80,D90, D7000, D200, D300, D700, D800, D2, D3, D4