In this short video, Jared Platt shows how to freeze motion using high-speed sync with the Profoto B1 and B2 heads, which work with TTL flash systems on Canon and Nikon DSLRs.
While he demos the Profoto kit, the same rules apply to smaller speedlight kits and other TTL monolights and flash heads. With purely manual flash communication, however, you are limited to the sync speed of your camera (often around 1/200s) and won’t be able to freeze that motion.
Nice instructional video Jared, with a better understanding on the differences & value of using hi-speed sync flash. However, I couldn’t help but notice the difference in the model’s demeanor in the 3 photo examples; i.e., no smile until the hi-speed sync shot, along with no catchlights until the hi-speed shot. Just a case of good luck, or good composition &/or compositing?
Capt_Jim