UV-Ultraviolet/Haze filters are wise initial investments. They help protect your valuable investment from nicks, bumps, scratches and moisture, which can lead to costly repairs or render your lens permanently inoperable. Usually the filter is left on the lens at all times for protection. UV filters provide additional benefits of correction for Ultraviolet(UV) light which can register on video or digital media as a bluish cast and can obscure distant details.