I'd most likely trust the Canon and go with that. Canon always has better resale value which I think speaks for itself. Its like buying a toyota or honda car, it costs more up front but in the end it will pay you back. I'm thinking 10mm is about as wide as you would want to go with a rectilinear lens unless it for video use. Canon matched up to a canon just always works better.





My main bread and butter lens is my 16-35IImm lens on the 5D2 and then my beloved 100mm IS macro which sees more non macro work. My soul would dry up and blow away if I didn't have my wide angle lens. I like to jump into the action and get into everyone's business.