HD-MCUV KnightX HD-MCUV series ultra-thin filters adopted a special technology of double sided 18 multi-coated lenses Nano Tech Anti Scratch protection film Waterproof Anti fingerprint protection film Highly Transparent protection film Anti UV protection film which assures high transmittance and highly smooth surface and avoids unnecessary reflection. Reduced internal reflections mean a clearer image with greater contrast. This Professional MCUV filter is a need for digital cameras. Material:Optical Glass UV Filter Improve contrast to your video and digital images by minimizing the amount of light. Especially useful in areas of high altitude, snow, or beach, eliminating the undesirable blue cast. Imported optical glass, top level of transmittance. Material:Optical Glass Red Frame UV Filter Improve contrast to your video and digital images by minimizing the amount of light. Especially useful in areas of high altitude, snow, or beach, eliminating the undesirable blue cast. Imported optical glass, top level of transmittance. Material:Optical Glass MCUV Filter MCUV series ultra-thin filters adopted a special technology of double sided, multi-coating, lens employs high quality optical glass, which assur es high transmittance and highly smooth surface and avoids unnecessary reflection. Reduced internal refl ections mean a clearer image with greater contrast. This Professional MCUV filter is a need for digital cameras. Material:Optical Glass CPL Filter Removes unwanted reflections from non-metallic surfaces such as water or glass Increases color and contrast by reducing reflections from non-metallic surfaces by cutting Improves clarity of distant objects Foliage is richer, skies bluer Material:Optical Glass ND Filter Enables slow shutter speeds to be used, especially with high-speed films, allowing film to record movement in subjects such as waterfalls, clouds, or cars; Decrease depth of field by allowing wider apertures to be used, in turn helping to separate subjects from their background Material: Optical Resin FLD Filter Removes the harsh yellow-green cast and gives nature light effect under fluorescent light Increases color saturation of subjects when shooting under natural light Rapidly absorbs water on the surface of glass, filters or lens. Material:O ptical R esin