R Crawford wrote:
I am considering a new Canon (perhaps the 60D) but I want the sharpest lens possible.
Okay, get a 400/2.8L IS.
I suspect that's not what you were after.
Sharpest lens in what focal length range? Prime or zoom? What speed do you need?
Generally speaking, lens sharpness is the least of your worries when trying to get sharp pictures.
(see profile for equipment)