From Manufacturer
The 82mm M2 Magnetic Quick Swap Circular Polarizer Filter from Freewell offers the usual benefits of a polarizing filter with the convenience of their magnetic quick-swapping system. Once the magnetic frame is screwed on to the front of your lens, different filters can be attached, removed, or swapped out quickly and conveniently. The selective control offered by the CPL lets you effectively eliminate reflections in surfaces like glass, metal, or the surface of water by simply rotating the filter. This allows you to simultaneously preserve detail and color saturation in your images as well. The German optical glass construction and multilayer coating make the filter scratch and oil resistant as well as water and dustproof. The included pouch and lens cap help you further protect your filter when shooting on the go and switching between filters.