Product DescriptionQuartzLine filters are made of 99.9% pure fused quartz for unrivalled durability and optical clarity. These single lens element, fused quartz filters produce a very low refractive index of 1.46 and offer outstanding temperature stability. The over-engineered brass filter frames thread on smoothly and are built to withstand your most rugged adventures. Featuring optical coatings for a hyper neutral colour profile, near perfect target transmission, and multi coatings for enhanced scratch resistance, water resistance, anti-reflectivity and reduced vignetting in wide angle shots, QuartzLine filters let content creators bring true-to-life colours to their final product, from the most extreme locations on the planet. Each filter includes a microfiber lens cloth, soft filter pouch and a filter hard case.Set Contains:Filter, hard case, soft case, cleaning clothFused Quartz Glass Element - Resolves up to 100MP sensorsPerfect Colour Neutrality - New coating process for zero colour shift16 Coating Layers - Anti-scratch/ anti-oil/ hydrophobic coatingsBrass Frame - Smooth threading and increased durabilityFilter, hard case, soft case, cleaning cloth