PolarPro's QuartzLine of filters for your DSLR or Mirrorless camera are 99.9% pure fused quartz, giving you unopposed clarity and unrivalled durability. Producing a very low refractive index of 1.46 and over-engineered brass filter frames, mean that you can take them into any environment and not run into any sort of breaks or issues in extreme temperatures. The QuartzLine are built to resist scratches, water and have a reduced vignetting when shooting in wide-angles. Bring your content to life with PolarPro's QuartzLine, bringing forward lifelike colours and filters that help assist in the creation of the end product.