Designed to match with the EOS-1D Mark III in terms of improved dust- and water-resistance, body strength, and the ability to control flash functions and settings from the camera menu (EOS-1D Mark III only). Other features include improved communication reliability through its direct contacts, and recycling time is both 20% shorter than the 580EX and is completely inaudible.
Compatible w/ all EOS cameras. E-TTL II w/ EOS-1Ds Mark III, 1Ds Mark II, 1D Mark III, 1D Mark II N, 1D Mark II, 5D Mark II, 5D, 50D, 40D, 30D, 20D, Rebel T1i, Rebel XSi, Rebel XS, ELAN 7NE, 7N, Rebel T2. E-TTL w/ EOS-1v, 1Ds, 1D, 10D, D60, D30, Digital Rebel XTi, Digital Rebel XT, Digital Rebel, D2000, ELAN 7E, 7, IIE, II, Rebel Ti, K2, 2000, G, GII, IX, IX Lite. See PowerShot Accessories for additional compatibility.