> Thanks Peter, didn't know that. Is the Sigma also a constant f/2.8
> lens? The Canon gets a resounding 4.2 on Photodo, which is pretty
> damn good, so the Sigma must be excellent if it's sharper.
According to photodo.com, the Sigma 70-200 (constant) 2.8 HSM gets a 3.9.
Heck, the Canon 80-200 even beats the Canon 70-200 by 1/10 of a point.
But, in reality, anything over a 3.2 is considered "critically" sharp,
right? So perhaps you wouldn't be able to tell the difference between a
3.9 and a 4.2. Dunno.
-Green
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