【Imported Optical Glass】 Crafted from premium AGC optical glass with 8 multi-layer coatings, this ND filter minimizes reflections and glare for superior image quality. 【Versatile Light Control】 Featuring 1 to 9 stops of adjustable light reduction and 360-degree rotation for precise dimming, this filter is perfect for various shooting scenarios. (Note: Max stops may cause a cross pattern effect, commonly known as a black "X" crossing. This phenomenon is natural and temporary, arising from the adjustable ND filter's interaction with specific lenses and focal lengths.) 【Anti-Glare Surface】 Treated with an oxidized sandblasting process, this filter prevents unwanted stray light and minimizes unnecessary reflections on the metal surface. 【Slim and Secure】 At just 7.4mm thick, the CNC-patterned design ensures enhanced friction while rotating, making it easy to attach/detach lenses and accessories anytime, anywhere. 【Compatibility Note】 This ND filter fits all 52mm lenses. Please verify your camera's lens thread size (usually next to a "ø" diameter symbol) before ordering. Additionally, a 55mm lens cap is required for this 52mm variable ND filter.