Upload & Sell: On
hmm, me thinks the 70-200 II is the sharpest zoom on the planet.
A well-calibrated Sigma 100-300 f/4 probably gives it a run for the money.
'Well-calibrated' being the tricky part
Also, the crusty Tamron 70-200 2.8 also gives it some competition.
Canon's 70-200 2.8 is probably one of the sharpest and best-performing zooms overall, but there *are* other zooms that can come close (or match) the IQ if we're just talking sharpness.