B+W CLEAR FILTER MRC nano MASTER 46 mmThis filter fulfills the desire of many photographers for pure lens protection without a filter effect.Its only function: to keep dirt, sand or splash water away from the front lens. The especially clear special glass with high transmission is MRC nano coated. The hydrophobic coating reduces the adhesion of particles and water droplets.Advantage: easy cleaning and maximum reflection reduction.The MASTER slim mount is suitable for super wide-angle lenses up to 17mm (KB) or 10mm (APS-C).