In message <>,
GT40 <> wrote:
>I would avoid consumer Sigma lenses, the pro line is much better.
>That said, you are always better going with camera brand lenses, ie,
>Canon lens on a Canon camera, and Nikon on Nikon, etc..
Not always. The Tamron macro lenses, for example, tend to have better
optics than the Canon macros. Here's a crop of 10D native pixels of
printed text taken with my Tamron 90mm f2.8 Di Macro *AND* a 2x Tamron
SP teleconverter (i.e., the resolution of the lens itself would do at
least this good with half the pixel pitch, or is at least twice what is
shown here):
http://www.pbase.com/jps_photo/image/35343985
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John P Sheehy <>
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