This 82mm Ultra-Slim polariser is for use exclusively with the Firecrest 100mm Filter Holder. Polarisers are essential filters for increasing the image quality of your outdoor photographs because they reduce atmospheric haze, increasing contrast between clouds and sky, and remove unwanted reflections from water, windshields, windows, and foliage. The Firecrest Circular polarisers are premium quality polarisers featuring our exclusive Firecrest anti-reflective multi-coating providing your images will have the highest contrast and fidelity. Firecrest Circular Polarisers are housed in our precision milled SuperSlim or UltraSlim rotating polariser rings.