ZOMEi 37MM Universal Adjustable Neutral Density Filter Lens/Clip-on ND 2-400 Filter Camera Phone Lens Kit ND FILTER For Mobile Phone is a zoom lens, lens can be adjusted by twisting, adjusted according to the brightness of the photographer needs! Portable and detachable: easy to install, remove. Let your trip much easier with this lens, and you take high quality photo with your devices at any time Adaptable For Your 37mm Thread Digital SLR Camera Lens Perfect for shooting water flow, traffic flow, ocean ,Clouds,human stream and other moving photography. High Quality: Made of upgraded high-class glass, Super light reduction.