**********No dark crossSay goodbye to the darkness 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.
*****Material 52mm Neutral Density: Made by Completed Professional Optical Glasses instead of Optical Resin. Filter reduces the intake of light without affecting the overall color balance, no color cast. *****NANOTECOur optical engineers developed new Nano coating layer technology, Waterproof, scratch-resistant, anti-reflective green coating, effectively prevent from oil, fingerprint, scratch, protect valued lens*****Professional Designultra slim rim design preventing wide angle vignetting. Extra tough aviation aluminum frame ensuring durability and jamming prevention. Lens caps and hoods are also not compatible. *****NOTEThis Filter kit is compatible with all 52mm lenses. Please verify your camera's lens thread size(usually marked somewhere on the lens barrel or printed underneath the lens