The Knobloch Filter clip-on system is comprised of a supporting holder and a filter lens. The clip-on-holder is put on the lens holder from the front allowing various filters to be clipped on. Filters are designed to suit a variety of light conditions and are available in yellow, orange 35%, orange 55%, red, brown, grey/green, grey, amethyst and polarized.

The filters and clip-on-holder are available in either 37mm or 23mm to match your lens holder. Suits Knobloch K1 and K2 shooting glasses.