woos Offline Upload & Sell: Off
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Heh-heh-heh...if you can, check out the Sigma 70-200 OS in the store side by side with the Nikon 70-200 VR2. Results might surprise you.
What the extra thousand dollars gets you:
1. Little sharper at 70mm 2.8, corners especially.
2. A focus limiter (why Sigma, why do you not include this on the 70-200 and 120-300mm).
3. Weather sealing.
Is that worth the price? Maybe, maybe not.
The Sigma 24-70mm is supposed to be quite decent (never tried one), and the price is right, but it doesn't compare to the Nikon 24-70mm---this seems to be a universal opinion. It seems to be more of a last resort choice. Imho, if you are going to deal with the 82mm filters, go for the Tamron 24-70 VC.
The Sigma 24-70mm was released a bit before Sigma started to come out with two things: designs that seem to be really solid and don't need to be priced super low to be good values, and FLD glass. Something changed at Sigma between 2008-2010... Before then, it was "it's good for the price usually, but you really get what you pay for". Now, with stuff like the 8-16mm, 17-50mm OS, 85mm, 50-500 OS, 120-300 OS, 70-200 OS, 105 OS macro, and 150 OS macro, Sigma is on a roll. Unfortunately, the 24-70mm was before that. If they come out with a newer one with FLD glass, it'll probably top all but the new Canon 24-70, but that could be years and years, or never.
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