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Amazon.com : Sigma 17-50mm f/2.8 EX DC OS HSM FLD Large Aperture Standard Zoom Lens for Nikon Digital DSLR Camera : Camera Lenses : Electronics
Re: Nikon 17-55 or Sigma 17-50 2.8: Nikon Pro DX SLR (D500, D300, D200, D100) Talk Forum: Digital Photography Review
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