Hey, you can see what I have right now on my signature. My plan is to eventually be in the wedding business and to own a 5d mk2. I would like to be carrying both the 5d and the 500d at the weddings with certain lens mounted and I wont be switching the lenses unless I am doing the staged shots after the ceremony. My question is: 1. With one full frame and one cropped frame, what lenses will you mount on these two camera? I know only my 50mm and my sigma will fit the full frame. And which one will get the 550ex flash 2. More than likely the setup for no.1 will not be good. If I buy another lens, what lens do you think will fit very well for my situation (something more economical please.. nothing more than $1500). And what combination would you do for the 2 cameras. And which one will get the 550ex flash. Thank you guys!