How Flash Duration Impacts Motion Blur
Photographer Sam McGuire takes the Lumedyne 200W/S Action Pack for a spin. The different thing about this pack is that its T.5 and T.1 times get shorter when you increase flash power. (Usually, the more power you use, the more time it takes the strobe to push it out).
Sam compares two images taken at similar conditions with a short and long T.1 and demonstrates how strobe duration, much like shutter speed, can control motion blur.