The SFD450C Illuminator Dedicated Flash from Bower is a dedicated E-TTL / E-TTL II flash for use with Canon digital SLR cameras. The Illuminator features a guide number of 108' at 100 ISO and a tilt head that operates from 0° to 90° as well as swivel of 120°. The flash covers an 18-55mm range (in 35mm/full frame format) and also offers red-eye reduction, automatic shutter speed setting, and rear curtain synchronization for shooting at slower shutter speeds. The SFD450C is powered by 4x easily found AA batteries.