Focus Camera 72mm 3-Piece Lens Filter Kit with UV, CPL and Neutral DensityThe Focus Camera 72mm 3 Piece Lens Filter Kit includes a UV Protective Filter, CPL Circular Polarizer Filter and a Neutral Density Filter. Each individual filter is heat treated and multi coated to avoid any rare movement or distortion. Each of these multi coated glass filters will optimize your photography experience, and protect your lenses from scratches and dust. Circular Polarizer Filter (CPL) The CPL filter is often used to increase the contrast