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Amazon.com : Sigma 50mm f/2.8 EX DG Macro Lens for Nikon SLR Cameras - Fixed : Camera Lenses : Electronics
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Amazon.com : Sigma 50mm f/2.8 EX DG Macro Lens for Canon SLR Cameras (Discontinued by Manufacturer) : Camera Lenses : Electronics
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Sigma 50mm f/2.8 EX DG Macro Lens for Canon SLR Cameras (Discontinued by Manufacturer) : Camera Lenses : Electronics - Amazon.com
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