The 17-55mm that I am using is very sharp for focal lengths <24mm, even when wide open. No focusing issue either with the AF system... only problem that i had was the CA which I thought was bad in the copy that I am using...focusbug said:Nikon AFS 17-55 mm f2.8 DX
Tested few when I was buying and found them to be lacking in sharpness. Even mine and one belonging to a friend has AF accuracy problem at focal length shorter than 24 mm. AF seem Ok for longer end of the focal length. Need to manually re-adjust the focus ring to get a sharper photo.
Anyone else has this problem?