High Speed Sync is a really great technology. Here is one shot that I just did where I used the high speed sync capabilities of my flash:
Shot with my Nikon D700, SB-900 mounted off camera and Nikkor 24-70mm f/2.8 Lens
SHUTTER SPEED: 1/5000" (try doing that with a PocketWizard!)
APERTURE: f/2.8
ISO: 200
FOCAL LENGTH: 28mm
Thanks for stopping by,
Mike
