almost 3 Yrs, no dust, no IS problems, sharp as a tack. I hadFive 24-70 lenses and sold them all. They are not very easy to use on a crop camera. The 17-55mm IS is lighter and feels better balanced.


Unfortunately, I've sold my 40D and now use a 5D MK II and a 1D MK II, so I guess I'll sell the lens. I really hate to see it go.