★【Block Wavelength】: Light pollution reduction filter blocks the wavelength of light from common light pollution sources, allowing the picture to show true colors and high definition picture quality. Electronics/Accessories & Supplies/Cell Phone Accessories/Photo Video Accessories/Lens Attachments | ★【Optical Glass and CNC Precise Molding】: Optical glass, no color cast, to ensure high definition image quality. CNC precise molding, non slip pattern, thin gold thread design. | ★【Double Sided Multi Layer Coating】: The light pollution reduction filter is waterproof, oil proof and scratch resistant to protect your camera lens. | ★【Ultra Thin Frame Design】: The ultra thin frame minimizes vignetting from wide angle and telephoto lenses. | ★【Applicable Scenes】: Natural night filter light pollution filter is great for nightscapes and astrophotography.