PolarPro Quartzline 82mm Circular Polarising Filter SKU: PQL82CP A circular polarising filter is a landscape photographer's most sought after camera accessory as it allows you to capture vividness and contrast in a photo. CP's can be used in any situation where water reflections, glare, or haze are an issue. Unlike UV or ND filters, which only need to be attached to work, polarising filters can be rotated to adjust the intensity of the effect. QuartzLine filters are made of 99.9% pure fused-quartz glass for unrivaled durability and optical clarity. These single lens element filters produce a very low refractive index of just 1.46 and offer outstanding temperature stability. QuartzLine filters let content creators bring true-to-life colours to their final product from the most extreme locations on the planet. Each filter comes with a microfibre lens cloth, soft case, and a magnetic hard case. Combined with an over-engineered brass frame, 16 anti-scratch, anti-oil, hydrophobic coatings on filter lens, the QuartzLine filters thread on smoothly and are built to withstand your most rugged adventures.