Canon Filter Adapter FA-DC67A 4728B001 B&H Photo Video
Starizona Filter Slider - 2" to 36mm Unmounted Filter Adapter
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
3M 701 Black/Orange Filter Adapter - 051138-29113 [PRICE is per BAG of 2]: Safety Respirator Cartridges And Filters: Amazon.com: Tools & Home Improvement
Ninja Filter Adapter Kit - Creative Magnetic Accessories for Smartphones – Fotodiox, Inc. USA
DwarfLab - Filter Adapter for DWARF II | Telescopes
Filter adapter for Basler Lens 6 mm, 8 mm | Basler AG
Amazon.com : K&F Concept 18 Pieces Filter Ring Adapter Set, Camera Lens Filter Metal Stepping Rings Kit (Includes 9pcs Step Up Ring Set + 9pcs Step Down Ring Set) Black : Electronics