Features: Crafted from optical glass with 8 multiple layer coatings, this ND filter reduces reflection, ensuring superior images quality. With 1 to 9 stops of adjustable light reduction and 360-degree rotation for precise dimming setting, this filter is perfect for scenario. (Note: largest stops may cause a pattern effect, commonly known as a "X ". Treated with a oxidized sandblasting process, this filter prevents unwanted light and minimizes unnecessary reflection. At a mere 7.4mm thickness, ensures enhances frictions while rotating, making it easy to attach/detaches lens and accessories anywhere. We have ND Filter 37mm/40.5mm/43mm/46mm/49mm/52mm/55mm/58mm/62mm/67mm/72mm/77mm/82mm For choice, please choose what you need size. please verifying your camera`s lens thread size before ordering. Specifications: Material: Alloy Diameter(Optional): 40mm/43mm/46mm/49mm/52mm/55mm/58mm/62mm/66mm/72mm/77mm/82mm Package Includes: 1pc ND Filter note: Adjustable ND Filter Feature: Reduces the amount of light reaching film without affecting the color. ND Filter Function: Neutral density can be adjusted from ND2 to ND400, Reduces the amount of light reaching film without affecting the color. Have Control of Any Lighting Environment. Effectively decreasing depth of field. Suitable for dynamic screen, waterfalls. Please verifying your cameras's lens thread size before ordering.This number is preceded by a "Ø"(diameter) symbol. When using the ND filter to ND400 or bigger degree density, it will appear "X" or a blurs in the picture, it is a normal phenomenon. (Suggestion:lower down the density value gradually, until the facula disappeared) Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.