Polar Pro QuartzLine 46mm ND16 Polarizing Filter, 4 Stops

QuartzLine filters are made of 99.9% pure fused quartz for unrivaled 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 color 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 colors to their final product, from the most extreme locations on the planet. Each QuartzLine filter includes a microfiber lens cloth and a filter hard case.Fused Quartz Glass• Low refractive index (light bending) of 1.456• Low surface reflectivity• Stable in extreme temperatures/environmentsPrecision Coatings• Optical ND - Achieves a near perfect target transmission while maintaining a hyper-neutral color profile• Hydrophobic - Repels oils and water for easy cleaning/care• Scratch-Resistant - Increases surface hardness for an extremely durable, scratch-resistant exteriorBrass Frame Construction• Hand-crafted 4 part frame• Threads on smoother than aluminum• More dense than aluminum for extended durability• Matte black interior coating eliminates reflections