The 90mm Magnetic CPL is made from Schott B270 optical glass with multi-coated. Designed to avoid vignetting when used with a wide-angle lens and can be independently rotated to adjust the intensity of the polarization effect.
The K9 100mm Filter Holder Kit include K9 100mm Filter holder, 90 mm Magnetic CPL Filter, 77mm and 82mm Magnetic Adapter Ring, 67-82mm and 72-82mm Step Up Ring.