[youtube https://www.youtube.com/watch?v=0j5AHzAGaFk&w=700]

Check out this video from Karl Taylor that covers flash sync speeds and why you can’t synchronize your flash on a higher shutter speed. He breaks down details of how focal plane and leaf shutters operate, as well as understanding how high speed sync works at the much higher shutter speeds (up to 1/8000s on some cameras).