The 850nm, 82mm Kolari Vision Pro Gen 3 Infrared Lens Filter is fitted with precision machined brass rings, enhanced grip, and a superior lifetime warrantied construction while maintaining a low profile over your lens. This external infrared filter is perfect for adding to a full-spectrum conversion or on top of another infrared conversion to get a different effect. The filter features a hydrophobic AR coating that increases scratch resistance and causes dust, smudges, fingerprints, water, and even permanent marker to slide right off its surface with minimal effort. The brass ring construction features front and rear threading and an aggressive grip knurling for easier filter removal.