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.
Regards
Keith
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