Rear Sync or Second Curtain Flash Explained
Rear or second curtain sync flash is a flash mode available on many (though not all) cameras. It is designed for use when you want to combine a slow shutter speed with flash. Unlike the standard flash mode, rear curtain sync flash will fire the flash at the end of the exposure, rather than the start.
In this article we'll take a in-detail look at rear curtain sync flash, looking at how the resulting image differs to standard flash, and why and when you might want to use this flash mode.
