The Hoya 58 mm HD MKII IRND 64 Neutral Density 1.8 6-Stop Filter is a high-precision optical accessory for photographers and filmmakers who require exact light control. It reduces light transmission by 6 stops, corresponding to a density of 1.8, allowing for longer exposure times or wider apertures in bright lighting conditions. This filter utilizes ACCU-ND technology to ensure consistent light reduction across the visible and infrared spectrum while minimizing color shifts for true-to-life image reproduction. The construction features a flat, lightweight aluminum frame that prevents light leakage and supports the attachment of additional filters for extra accessories. An advanced anti-reflective multi-coating reduces reflections and flare effects, while a water-repellent and oil-repellent top layer simplifies cleaning and prevents the ingress of contaminants. Ideal for creative depth-of-field effects or synchronizing shutter speeds with frame rates, this durable filter ensures reliable performance in various shooting situations. Compatibility with other ND filters allows for a combined light reduction of up to 16 stops when stacked, providing enhanced versatility for professional applications.