I purchased this lens to replace the EF 24-104mm f/4"L" IS USM that I had sold. I know there are many people who prefer that lens for its IS, but for my needs, the 2.8 just takes the cake and IMHO the Bokeh is superior. I use it on a crop body XTi (400d) and couldn't me happier. It compliments my Canon EF 70-200mm f/2.8"L" IS USM very well. Check out its reviews on"photography-on-the.net" or "fredmiranda.com" and I think your decision will be an easy one!