The Tiffen 4 × 5.650″ Haze 2A Filter absorbs ultraviolet light to reduce atmospheric haze and the bluish cast often seen in outdoor, aerial, and long-distance photography. It improves image clarity and contrast while maintaining sharpness and natural color without affecting exposure. Tiffen filters are made using ColorCore® technology, a process that involves laminating the filter substrate between two pieces of optical glass and grinding it flat to a tolerance of 1/10,000th of an inch. This filter measures 4 × 5.65″ / 101.6 × 143.5mm.