You want to move the external flash unit several inches away from the axis of the lens, and you want to move it in the direction of being directly above the lens, despite whether you are shooting horizontally or vertically. A flash bracket is a device that allows an external flash unit to be lifted away from the camera, eliminating “red-eye” and grotesque shadows. The higher the flash the less noticeable the shadows behind your subject will be. Stroboframe makes a nice lightweight bracket.

Read more: Why Use a Flash Bracket? | eHow.com