Amazon.com : 40.5mm Multi-Coated UV Protective Filter for Sony Alpha A5000, A5100, A6000, A6300, A6500, NEX-5TL, NEX-6 Digital Camera That has Sony 16-50mm f/3.5-5.6 OSS Alpha E-Mount Retractable Zoom Lens : Electronics
Amazon.com : Hoya 40.5mm Digital Filter Kit with 3 Filters & Pouch : Camera Lens Filter Sets : Electronics
Rare Zorki 1954 GS-12 yellow filter 40.5 mm - uralseller.com
Whatman 10300103, Grade 589/2 Medium Fine Precipitate Filter, 40.5 mm circle (100 pcs)
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Amazon.com : Hoya 40.5 mm UV(C) Digital HMC Screw-in Filter,Y5UVC040 : Audio Video Accessories And Parts : Electronics