I'm looking for a fast (preferably f2 or better) short-telephoto lens to use with my T2i. I need a lens that will be able to render a very flat, out of focus background, so I think 85mm would be the shortest I'd be willing to buy -- though for the effect I want I might need something even longer, like 100mm. Any suggestions? Any and all lens makes are fine as long as they can be adapted to EOS.