The Hoya HD Mk II UV Filter absorbs ultraviolet radiation, which often makes outdoor shots hazy and unclear. It is a versatile, weather-resistant filter suitable for both color and black-and-white photography. Additionally, the filter serves as a permanent lens protector. With constant use, your valuable lenses are shielded from costly damage to the front element caused by dirt, impacts, or scratches. The high-density sharp cut UV glass has been chemically enhanced and quadruple reinforced. The double-sided 16-layer anti-reflective multi-coating is water and oil repellent, as well as scratch and dirt resistant. The ultra-thin frame is compatible with wide-angle lenses. The glass has been mounted using high-pressure pressing technology.