[I]f you’re getting interested in flash photography, a lot of unfamiliar terms may pop up: sync-speed, high-speed sync, rear-curtain sync, to name a few. It’s a lot easier to get a grasp on the terms if you have a better understanding of how flashes work with your camera’s shutter, and ultimately, how your camera’s shutter works. To help explain things, I’ve made this quick video.
This video is intended to be more of an introduction to the concepts involved, rather than instruction on specific techniques.
For what it’s worth, “Sync-Speed” is also frequently called “X-sync” speed, though X-sync usually refers specifically to first-curtain sync.
As usual, if you have any questions or comments (I’m always curious to hear whether anyone has actually watched these things), please let me know in the comments section below.