I'm not sure why so many people are shooting FF normal zoom on APS-C bodies. To me the range is just not right; 24mm is considered wide on a FF, but on a APS-C it's like a 40mm on a FF which is rather narrow, and to me does not qualify it as a general purpose zoom.


So to me, the 24-105mm is out. If you are considering the 15-85mm f3.5-5.6, you should also look at the Sigma 17-70mm f2.8-4 IS. It has a little smaller range, but the bigger aperture, and also a IS. The price is also somewhat lower. I havent seen any reviews, but they should be out soon (maybe also on this page).