• 【HD Optical Glass Material】Variable ND Filter: Made by Professional Optical Glass instead of Optical Resin, can effectively reduce the surface reflection of the filter, and greatly reduces the occurrence of glare. Rotating the filter to change light intake without affecting the overall color balance.
• 【No "X" cross on images】Say goodbye to the black "X" cross on images, K&F utilize cutting edge technology you're going to say goodbye to this common issue with wide angle lenses and variable ND filters.
• 【Double-sided NANOTEC Coating】New Nano coating technology, it balances the light penetrating trajectory well to ensure that the sharpness of the image is not compromised. It also makes the vnd filter waterproof, scratch-resistant, anti-reflective, effectively prevents oil stains, fingerprints, scratches, and protects precious lenses.
• 【Slim Frame】Ultra slim rim design preventing wide-angle vignetting. Extra tough aviation aluminum frame ensuring durability and anti-clogging.
• 【Choose the right size】This filter is compatible with all 72mm lenses. Please verify your camera's lens thread size first(usually marked somewhere on the lens barrel or the lens cap).This number is always preceded by a "Ø" symbol. i.e. Ø58 = 58mm lens thread size.

Internal Ref - B2