I currently do not use my 24-105 on a 1.6x body, but I did for several years--first on a Rebel XT and then on a 40D. I initially had a 28-135 for my Rebel but found the quality lacking (especially after renting a 70-200 f/2.8L IS), so I got the 24-105 before a trip to England. I was so glad I did. Its a great lens, and I thoroughly enjoyed using it on both of those crop bodies. Of course, after moving to FF, it's like I got a brand new lens--24 was really wide, the DoF I was accustomed to changed, etc, but they weren't aspects I'd missed on my XT/40D. Others have suggested renting, and I think that's a great idea. I've used a lens rental several times to help inform my opinion. Reviews and shared opinions are extremely valuable, but nothing beats personal experience. Best of luck with your decision!


Aaron