Sigma has announced the 70-300mm f/4-5.6 DG OS lens for Sigma, Sony, Nikon, Pentax and Canon mounts.  Sigma claims that the Optical Stabilization system will help you achieve an additional 4 stops of hand-holdability.  The new lens should be available at an initial retail price of $499.99.  Check availability on Amazon.com . More details in the news release below. Sigma 70-300mm f/4-5.6 DG OS News Release The Sigma Corporation is pleased to announce the new 70-300mm F4-5.6 DG OS.

The rest is here: 
Sigma 70-300mm f/4-5.6 DG OS

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