Keith Green wrote:
>
> Ken Durling wrote
>
> > The Tamron 20-40 *is* an extremely sharp lens.
> > FWIW, photodo rates it a 3.7, higher than any of the Canon zooms
> > (17-35L = 3.2; 20-35L = 3.5) in the same range. Okay those are just
> > numbers, but if you look at slides from the lens, they are razor sharp.
>
> If only Tamron would bring out their version of USM :-)
> Seriously, how fast is the focusing with what, I presume, is an AFD type
> motor.
Focusing speed should not be a major problem with wide angle lenses.
E.g. the Canon EF 20-35mm L isn't USM as well - and I've never had a
problem with the lens focusing too slow.
Thomas Bantel
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