High-Speed Sync Explained: How to Take Control of Bright-Light Strobe Photography
There is a specific kind of frustration that comes from standing in bright midday sun with a strobe, a great subject, and a camera that refuses to cooperate. You want to shoot wide open to separate your subject from a busy background. You want the shutter fast enough to darken that background down to something dramatic. But the moment you push past your sync speed, you get that ugly black bar creeping across the bottom of the frame.