About this item Import Optical Gl Crafted from premium AGC optical gl with an astonishing 18 multi-layer coatings, this ND filter reduces reflections and glare, ensuring superior image quality. Versatile Light Control With 1 to 9 stops of adjustable light reduction and 360-degree rotation for precise dimming settings, this filter is perfect for diverse scenarios. (Note: High stops may cause a cross-pattern effect, commonly known as an "X black cross." This phenomenon is natural and temporary, occurring due to the adjustable ND filter's interaction with certain s and focal lengths.) Glare-Free 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 a mere 7.4mm thickness, the CNC-patterned design ensures enhanced friction while rotating, making it easy to attach/detach s and accessories anytime, anywhere. Compatibility Note This ND filter suits all 40.5mm s. Check your camera's lens thread size (usually beside a "ø" diameter symbol) before ordering. A 43mm lens cap is also required for this 40.5mm variable ND filter.