Optical Glass UV‑IR Cut Filter Infrared Pass Lens Filter for DSLR Camera | eBay
Hoya 77mm R72 Infrared Filter B-77RM72-GB B&H Photo Video
IR Filters (Infrared Filters) - Bluefors.com
Kolari Infrared Full-Spectrum Standard IR 10-Filter Kit – Kolari Vision
Introducing Bluefors IR Filter - Bluefors.com
Chapter 4 - Internal filters for modified cameras - Super Color Infrared Filter - Infrared Conversions, IR Modifications & Photography Tutorials | Life Pixel IR