Digital BW, The Print

Bob, I'll be happy to send you a small section of a 13x19 inch print.
(as a hi res file). It is as sharp as any canon lens I own except the
canon macros, which are in a class by themselves. This particular sigma
is much sharper than anyone would expect an inexpensive sigma to be. I
was absolutely amazed. it is the 75-300 Apochromatic. I always use it on
a tripod, and usually at F11, its sharpest aperture. 

Jerry

Bob Frost wrote:
> 
> Jerry,
> 
> You're right in saying that your Sigma 75-300 is as sharp as Canon's or
> Nikon's 75-300 offerings, but none of them is really sharp! They only score
> about 3.1 in Photodo's tests. The better zooms from Canon and Nikon now
> score almost as well as prime lenses and manuals for sharpness - around the
> 4.1 mark (out of 5).
>