The lens is made of optical glass, high-definition grinding treatment, sturdy. The color cast of the traditional ND filter is avoided by the coating process, can restore the original color of the picture. Using doublesided multilayer nanocoating technology, the lens has waterproof, oilproof, fouling-proof and scratchproof performance. ND filter can reduce the exposure of camera, extend the exposure time, and help water or clouds in the photo create a soft, cottonlike texture. Fit for DJI Air 2S lens, easy to install and operate, only need a few steps, effectively save your time.