Further readings for the Sigma 70-200mm F2.8 EX DG APO OS HSM Nikon
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I bought this lens of eBay for ~$440 including a lowepro case. One of the best deals I've ever found -- a like new Sigma telescopic zoom for 1/5th the price of a new Nikkor equivalent. And from what I've read and the pictures I've compared, only the trained eye (or the critical one) will notice significant difference between the two. More than likely the Nikkor will help less experienced photographers "cheat" or "get away" with being a little more sloppy in their shooting form.
<div id="linkdxomark">This a comment for <a href="http://www.dxomark.com/index.php/en.../Lenses/Camera-Lens-Database/Sigma/70-200mm-F2.8-EX-DG-OS-HSM-Nikon">this page on the website</a></div>So i am the first one to write about this lens so here we go. As you already know that Sigma is made in Japan so as we espected this built of this lens is very good and don't be mistaking because of his tag price this is very good lens compering to his components like Nikon and Canon that costs about a 1000$ extra than a Sigma i can say that Nikon and Canon lenses at the same range 70-200 a little bit better but you pay a lot more money for more 1000$ you will get about a 15% more lens but you should think is this worth it or not if you don't have a problem of spending money then go for the Nikon or Canon but if you are not a super profesional that needs the best of the best than save this money for something else and buy this amazing Sigma lans that will give you all you want .