About this item: * Imported AGC GlassVariable nd filter made by importing AGC glass, first-class filter material balancing the color batter, with no color cast and no effect for the image clarity and sharpness. * Self-Lock Frame, No 'X crossSay goodbye to the "X" cross on images, K&F Concept utilizes cutting-edge technology to perfectly avoid the common "X" issue of variable nd filter on wide-angle and telephoto lenses. * NANOTECK&F Concept optical engineers developed multi-layer nanometer coatings (total of 40), waterproof, scratch-resistant, and anti-glaring, protecting the valued lens and presenting high-quality photos. * Ultra Slim Frame Avoid Vignetting7.4mm Ultra-slim frame design utmost avoid the wide-angle vignetting (support 40mm focal length no vignetting). CNC-non-slip design helps install and remove the filter easily. * NOTEThis filter kit is compatible with all 82mm lenses. Please verify your camera's lens thread size before ordering. The number is always preceded by a "" (diameter) symbol. For the 82mm nd filter, the lens cap/hood size should be 86mm. Fractional transmittance