quelques infos ici : Hot Shoe Mount - Canon 580EX II Speedlite

Camera compatibility (as of February 2007):

E-TTL operation with all EOS digital SLRs; PowerShot G2, G3, G5, G6, and Pro1; and the following EOS film cameras: EOS-1v, EOS-3, Elan 7N series, Elan 7 series, Elan II series, Rebel T2, Ti, K2, GII, G.

E-TTL II autoflash with EOS 20D, EOS 30D, EOS 350D, EOS 400D, EOS-1D Mark II, EOS-1D Mark III, and EOS 30V Date/33V.

TTL operation with all other 35mm EOS SLRs, and Canon T90.