Sigma 70-200mm f2.8 OS review: a more affordable version of the popular fast telephoto zoom

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Sigma's 70-200mm f2.8 OS is the company's latest 70-200mm and its first to sport optical stabilization. Available for Canon, Nikon, Sony, Pentax, and Sigma's own mounts, it offers a more affordable alternative to the 70-200mm f2.8 options from the big camera manufacturers. So the big question then is how it compares? In his in-depth review, Cameralabs' lens tester Thomas put it through its paces on a 36 Megapixel Nikon D800 to really see if it could compete with pricier rivals. Find out whether it's the bright telephoto zoom for you in our Sigma 70-200mm f2.8 OS review!

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