This ND filter is made by importing Japanese AGC optical glass, a total of 28 multi-layer coatings, effectively reducing reflection from the filter itself and glare, ensuring a high-quality image. This filter frame designed as a putter can help you accurately adjust the stop, for video shooting users can automatically adjust the stop via auxiliary tools, 360-degree rotation to adjust the stops, and multi-scene application. Both glass sides of K&F Concept ND filter with multi-layer hydrophobic, oil-proof, and scratch-resistant coating, protecting the nd filter from all around, suitable for adventure use. 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 with 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.