Treated with a oxidized sandblasting process, this filter prevents unwanted light and minimizes unnecessary reflection 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 Crafted from optical glass with 8 multiple layer coatings, this Filter reduces reflection, ensuring superior images We have Filter 37mm/40.5mm/43mm/46mm/49mm/52mm/55mm/58mm/62mm/67mm/72mm/77mm/82mm optional, please choose what you need size. please verifying your camera`s lens thread size before ordering At a mere 7.4mm thickness, ensures enhances frictions while rotating, making it easy to attach/detaches lens and accessories