【VND & Black Diffusion Filter1/4 Function 2 in 1】One filter has the ND & balck diffusion 1/4 effect filter features, it not only can control the amount of light enter lens via adjust (1-5 stops ), but also creats cinematic dream effect for photos and video. | 【No "X" Cross in Images】No "X" cross on images, K&F utilize frame-self locked technology to avoid this common issue on wide angle lenses and variable ND filters. CNC-non slip frame helps install and remove the filter smooth. | 【Import Japanese AGC Glass】Made by professional optical glass, the black diffusion 1/4 filter keeps standar 84% transmittance. Double side polishing technology ensures HD images and sharpness even on wide-angle lens. | 【28 Multi-Layer Coatings】This multifuctional filter with double sides multi-layer coatings (total 28 layer), effectively reduces reflection came from filter itself, hydrophobic, scratch resistant , oil proof , easily for cleaning. | 【Note】This filter is compatible with all 77mm lenses. Please verify your cameras lens thread size(usually marked somewhere on the lens barrel or printed underneath the lens cap) before ordering. The number is always preceded by a "ø" (diameter) symbol.