canon 15-85mm lens
I've used it on a 400D also w/no problems. This is the best lens in it's range I've ever owned all around Sharp, good build for a non-L, no big problem with CA. I pretty much stopped using my kit lens, my 12-22, 17-85, etc after getting this. I also compared it in the field with the more expensive 24-105 L. I was very hard for me to discern an IQ difference, which is why I didn't buy the L.