Interfit E-Flash Panel Smart Flash for Canon EOS, Nikon, Olympus & Pentax Digital SLR Cameras Built-in slave "sees" the light from other flashes, and triggers instantaneously. Flat panel design provides soft light inthe fraction of the space of a conventional flash with softbox The Interfit E- Flash is a flat panel flash that provides softer light than a conventional on-camera flash. It comes mounted on its own hot shoe, and may also be fired from the included Sync cord. It may be used off-camera, on a flash bracket, or mini tripod, both available separately.