The Bower SFD35C Digital Auto-Focus Flash is a fully dedicated E-TTL I/II program flash designed to work with the Canon Digital Rebel, Digital Rebel XT, 20D, and other Canon DSLR's for improved flash photography. It will also work with Canon 35mm AF film SLR models.
Designed with professional and amateur photographers in mind, the SFD35C flash is equipped with a guide number of 112' with full E-TTL I/II metering, automatic shutter speed control and aperture control of digital and analog SLR cameras.
SFD35C Digital TTL Shoe Mount Flash (Guide No. 112'/34 m at 50mm) for Canon E-TTL II