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Amazon.com : NEEWER 49mm ND/CPL/UV/FLD/Close Up Filter and Lens Accessories Kit with ND2 ND4 ND8, Close Up Filters(+1/+2/+4/+10), Tulip Lens Hood, Collapsible Rubber Lens Hood, Lens Cap, Filter Pouch : Electronics
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Amazon.com : Hoya 49 mm Pro ND 64 Filter : Camera Lens Neutral Density Filters : Electronics
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Amazon.com : 49mm ND Variable Neutral Density Filter for Pentax 43mm f/1.9 Lens : Electronics
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Amazon.com: Step Up Lens Filter Adapter Rings - Set of 9 - Allows You to Fit Larger Size Lens Filters on a Lens with a Smaller Diameter - Sizes: 37-49, 49-52, 52-55, 55-58, 58-62, 62-67, 67-72, 72-77, 77-82 mm : Electronics
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Amazon.com : Tiffen 49UVP 49mm UV Protection Camera Lens Filter , Black : Camera Lens Sky And Uv Filters : Electronics