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Amazon.com : Sigma 70-300mm f/4-5.6 DG APO Macro Telephoto Zoom Lens for Pentax and Samsung SLR Cameras : Camera Lenses : Electronics
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Amazon.com : 77mm 7 Piece Filter Set Includes 3 PC Filter Kit (UV-CPL-FLD-) and 4 PC Close Up Filter Set (+1+2+4+10) for Canon, Olympus, Pentax, Sony, Sigma, Tamron SLR Lenses, Digital Cameras
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