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Amazon.com : Sigma 10-20mm f/4-5.6 EX DC HSM Lens for Nikon Digital SLR Cameras : Camera Lenses : Electronics
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File:Nikon D50 with Sigma 10-20mm 4-5.6F EX DC HSM lens and Canon EOS 5D with Sigma 12-24mm F4.5-5.6 II DG HSM lens.jpg - Wikimedia Commons
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