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from
"Breandan",
www.bhphotovideo.com
the sealed lens construction is very nice; focus is extremely fast and accurate unlike some other sigma lenses i've used.
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from
"ehersh101",
www.bhphotovideo.com
my copy has no focus problems besides the fact that wide open i have to make sure i know where im focusing but that???s the same with every 2.8 lens.
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from
"R-U-Ready Photo",
www.bhphotovideo.com
also the complains of focus issues is not a factor with the 70-200, and i find it to be sharp wide open at all lengths.
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from
"Mel",
www.bhphotovideo.com
the fastest auto focusing lens i had ever come up with!
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from
"Greg",
www.bhphotovideo.com
i have been reading and renting several lenes over the past year, and heard from so many that the sigma is a front focus nightmare and you shouldn't buy one if you can't test it out first.
Positives:
Nice Zoom, Nice Image Stabilization, Zoom Lens, Autofocus,Manual Focus