Flickrer George has posted details of a clever project, wherein he turns an ordinary 32oz styrofoam cup into a ring flash. It's as ingenious as it is simple: The large end of the cup is cut off and flipped, then re-glued to form a collector for the camera's built-in flash.
It's designed to be used for macro photography: there's too much light-spill for regular shots, but the results when combined with an add-on Raynox close-up adapter are stunning in themselves, before you even consider the simplicity of this hack. Check 'em out.
CCRRFD-RNX Magnum - "How To Make It" [Flickr via Make]
Picture: [George/Flickr]