Hi there guys, i dont know if i haveposted this in the correct place, but I would like ti find out some information on a lens that I am about to purchase.

I am currently looking at the sigma 50 - 500 mm F4-6.3 EX DG HSM lens for a canon camera.
I would like to see if this lens is compatible with the canon 5d mk ii which I am also buying.
Is this lens designed to be used with a full frame sensor? Is there a crop factor with the lens? Any help would be much appreciated as I would like to know befor I shell out 900 bucks for it, to find out that it wont work.

Cheers guys...