Hoya 52mm Linear Polarizer Filter B-52PL-GB B&H Photo Video
Amazon.com : 52MM Lens Filter Kit by Altura Photo, Includes 52MM ND Filter, 52MM CPL Filter, 52MM UV Filter, (UV, Polarizer Filter, Neutral Density ND4) for Camera Lens w 52MM Filter +
Amazon.com : 52mm Pro Series Multi-Coated High Resolution Digital Ultraviolet Filter for Pentax smc DA 50mm f/1.8 Lens, Pentax DA 18-55mm f/3.5-5.6 AL WR Zoom Lens : Electronics
Gobe 7 x 52mm Filter Kit Grad Orange, Blue, Red, ND64 Pol, UV -Clean-