The HOYA HD Mk II IRND filters are HOYA's new premium ND filters, covering the most common densities ND8, ND64, and ND1000. With HOYA's industry-leading ACCU-ND technology, the filters provide uniform light reduction across the entire visible spectrum and prevent negative color casts caused by IR pollution during long exposures. The ultra-thin frame minimizes the risk of vignetting, and the water-repellent coating allows for easy and quick cleaning. Particularly recommended for advanced and professional photographers who frequently use ND filters and have high demands for image quality.