The H&Y ND400 Magnetic Filter is a precision-crafted neutral density filter, specifically designed for the H&Y RevoRing system with compatibility for diameters ranging from 67 to 82 mm. This advanced filter reduces light transmission by 8.5 stops, allowing for extended exposure times to create artistic photography effects such as motion blur in flowing water and cloud movements. Made from high-quality Schott glass, the filter maintains optical clarity and sharpness without compromising image quality. The 9-layer coating technology minimizes reflections and ensures accurate color reproduction while enhancing light transmission. A nanocoating provides water and dirt repellency, making cleaning and maintenance easier. The magnetic mounting system allows for quick and secure attachment to compatible RevoRing adapters, simplifying filter changes during photography sessions. This filter is particularly suitable for landscape and portrait photography, where controlled exposure times are essential. The diameter range of 67-82 mm fits various lens sizes within the RevoRing system, offering versatile application possibilities. The robust construction and precise manufacturing ensure consistent performance and durability under regular usage conditions. Professional photographers and videographers appreciate the reliable light reduction capabilities and optical quality for achieving creative exposure effects in various shooting situations.