???Black Diffusion Funciton???The K&F Concept black diffusion 1 filter with 74% transmittance, soft the image and video, controls highlight flares, making skin or pores more delicate, recommend using it on portrait photography, video records, and vlog videos. ???Import Premium Optical Glass???Made by Japanese high precision optical glass, ensure the high definition quality, multilayer coating effectively reduces reflection came from the filter itself and the ground. ???28 Multi-Layer Nanometer Coating???Both sides of the glass with nanometer coatings are waterproof, scratch-resistant, and oil-proof, with no effect on image quality, and easy for cleaning and carry. ???CNC Non-Slip & Ultra Slim Frame???Ultra slim frame of only 3.3 mm avoids vignetting on wide-angle and telephoto lenses, CNC-Non slip design is easy to install. ???Note???This filter is compatible with all 49mm lenses. Please verify your camera's lens thread size before ordering. This number is always preceded by a "??" (diameter) symbol. New and old packages are sent randomly