Older Canon Flash eg 550 ex on 7D
I've been using my 550 EX with my 20D for several years. When I used it with my 7D, I was astounded by how well it worked. The 7D and the 550 EX make a great combination.
Tempted by upgrading my 30D to a 7D. Will the 550 ex older flashes work on the 7D?