【Import Optical Glass】This ND filter is made by importing Japanese AGC optical glass, a total of 28 multi-layer coatings, effectivly reducing reflection from the filter itself and glaring, ensuring high-quality image. | 【Putter Design】Frame designed as a putter can help you accurately adjust the stop, video shooting users can automatically adjust the stop via auxiliary tools, each stop from ND2 to ND400 be marked on the frame conveniently for 360-degree rotation to adjust the stop, multi-scene application. | 【Waterproof & Scratch Resistant】Both glass sides of the K&F Concept ND filter with multi-layer hydrophobic, oil-proof, and scratch-resistant coating, protecting the nd filter all around, suitable for adventure use. | 【No Vignetting】For the filter designed with an ultra-wide-angle design, the ultra-slim frame is only 7.4mm, supporting in 16mm telephoto and wide-angle lens no vignetting, due to the difference in lens type and focal length so this filter might be met dark"X" cross, this isn't the quality problem, it can disappear via rotating the filter. | 【Note】This nd filter is compatible with all 77mm lenses. Please verify your camera's lens thread size before ordering. This number is always beside a "ø" (diameter) symbol. This 77mm variable nd filter needs a 82mm lens cap. | New and old packages are sent randomly