K&F True Color Variable ND2-32 (1-5 Stops) and CPL Lens Filter 2 in 1 for Camera Lens Neutral Density Polarizer Filter Nano-X Series* Variable ND & CPL filter 2 in 1One filter has the ND and CPL filter features, it can not only control the amount of light entering the lens to darken skies but also avoid unwanted reflections coming from non metallic, such as water, and glass. Enhance the color and contrast. * No X Cross on ImagesThe filter framme adopts self locking technology and rotates infinitely between 1 and 5 stops(ND2 32), which facilitates the positioning of light