Polaroid Optics 67mm Pro UV & Protective Filter &ndash; Ultra Slim Multi-Coated L39 German SCHOTT Superior Clarity Glass PRO SERIES L39 ULTRAVIOLET FILTER  Prevents Loss of Sharpness & Contrast by Filtering Out UV Rays & Haze; Allows for High Light Transmittance While Protecting Lens Against Scratches, Scuffs, Cracks & Smudges EXCEPTIONAL COLOR & CLARITY  Absorbs Atmospheric Haze & Sunlight to Enhance Color Accuracy & Reduce Unwanted Blue or Purple Color Cast; Perfect for Beautifying Outdoor Landscapes, Portraits, Etc. SUPERIOR SCHOTT CONSTRUCTION  Engineered To The Highest Clarity Standards, This Multi-Coated Glass Filter & Ultra Slim Ring Will Withstand Rugged Exposure to the Elements; Weather-Sealed Surface Blocks Moisture & Dirt From Infiltrating Lens DUAL THREADED DESIGN  Smooth Threads Easily Affix to Any Lens; Double-Sided Design Also Lets You Mount & Stack Multiple Filters for Other Optical Effects Like Warming, Polarizing, Macro Photography, Etc. COMPATIBLE WITH ALL CAMERA LENSES  To Ensure Perfect Fit, Optimal Saturation, Max Contrast & Zero Detail Loss, Verify Lens Thread Size Based on  Marking on Lens Barrel or Underneath Lens Cap