QuartzLine filters are made of 99.9% pure fused quartz for unrivaled durability and optical clarit...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. Cinema Series Glass - Made in Germany Brass Frame - Smooth threading and increased durability Perfect Color Neutrality - Our coating process produces zero color shift 16 Coating Layers - Anti-scratch / anti-oil / hydrophobic coatings.
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. Cinema Series Glass - Made in Germany Brass Frame - Smooth threading and increased durability Perfect Color Neutrality - Our coating process produces zero color shift 16 Coating Layers - Anti-scratch / anti-oil / hydrophobic coatings.