Great tack sharp lens. Its got some weight to it, which I prefer. All that is missing from this lens is a metal bezel and a little more environmental protection. With those two things, this is every bit as good as the L line and with IS! Great lens if your not running the large sensors. Would recommend.Get more detail about Canon EF-S 17-55mm f/2.8 IS USM Lens for Canon DSLR Cameras.