Jan 23 2008, 10:34 AM
QUOTE(xavierchan @ Jan 22 2008, 06:17 PM)
that is why some people will prefer to get a 3rd party lens instead of that...
but if stick to the topic, is it only because Tamron has constant f/2.8 in between 17-50mm? anything else?
if you look for reviews, the Tamron above is sharp .... while the Sigma above is not sharpbut if stick to the topic, is it only because Tamron has constant f/2.8 in between 17-50mm? anything else?
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