Medium Yellow Filter - Medium Yellow Filter - 40.5mm Medium Yellow Camera Lens Filter (8) (Special Order) - Heliopan US
40.5mm ND1000 (10 Stop) Fixed ND Filter Neutral Density Lens Filter for DSLR Camera - KENTFAITH
Kenko UV Lens Filter 40.5mm for DSLR Canon Nikon Sony Pentax – JG Superstore
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
Vintage 40.5mm Camera Lens Filters Sunnycross Skylight and - Etsy