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Amazon.com : Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens for Minolta and Sony SLR Cameras : Digital Slr Camera Lenses : Electronics
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Test: Sigma 300mm f/4.0 Marco Tele - DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging - Cloudy Nights
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Amazon.com : Sigma 70-300mm f/4-5.6 DG Macro Telephoto Zoom Lens for Canon SLR Cameras : Camera Lenses : Electronics
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