This is most often outdoors, especially at high altitudes, where the UV-absorbing atmosphere is thinner; and over long distances, such as marine scenes. It can show up as a bluish color cast with color film, or it can cause a low-contrast haze that diminishes details, especially when viewing far-away objects, in either color or black-and-white. Ultraviolet filters absorb UV light generally without affecting light in the visible region. Using a Tiffen UV Protector on your Digital HD DSLR While the UV Protection filter has served its purpose in the film era for many years it will still continue to be one of the most popular choices in accessories today. Digital cameras have blocks, auto correction and digital filters that combat the bluish color cast therefore making the UV Protection filter a simple protector for your lens to combat dirt, finger prints & that fateful knock or drop. Who are Tiffen? Tiffen has been a leading manufacturer and supplier of photographic filters and lens accessories for the consumer/professional imaging and the motion picture and broadcast television industries for 75 years. The company has a rich history of innovative product design, superior optical consistency and unparalleled quality. Tiffen has been recognized for its product and engineering excellence earning a Technical Achievement Award and a Scientific and Engineering Award from the Academy of Motion Picture Arts & Sciences, as well as an Emmy Award from the Academy of Television Arts and Sciences.