Bower SFD35C E-TTL I/II Digital Autofocus Flashgun Auto standby and check indicator Guide Number: 112 feet (50mm @ ISO 100) Bounce and swivel zoom head allows versatile reflection for difficult lighting conditions Compatible with all Canon EOS models including: 1D/1Ds, 5D, 7D, 50D, 60D, T1i, T2i, T3/3i, XSi, XS, XT/Ti, 300D, 400D, 450D, 1000D 28mm-85mm zoom coverage