K&F Concept Variable ND + CPL Circular Polarising Polarizer 2 in 1 Filter (52 mm)

2 in 1 Function of Variable ND Filter+CPL Filter: One filter has both of CPL and varaible ND filter function,save your time to replace two filters; it can not only reduce the amount of light entering the lens but also darken skies, manage reflections at the same time. Neutral density can be adjusted from ND2 to ND32, and it is easy to create different neutral density by rotating the ring. No “X” cross on images: Say goodbye to the "X" cross on images, K&F utilize cutting edge technology you're going to say goodbye to this common issue. NANOTEC: our optical engineers developed new Nano coating layer technology， Waterproof, scratch-resistant, anti-reflective green coating, effectively prevent from oil, fingerprint, scratch, protect valued lens. Material: Made by Completed Professional Optical Glasses Germany B270 instead of Optical Resin. filter reduces the intake of light without affecting the overall color balance.