Safeguard your lens and absorb UV light. Film and video are more sensitive to UV light than our eyes are. This often shows up as a bluish cast in images, especially shots from high altitudes and long distances, particularly over water. Ultra Violet filters are available in a variety of UV absorption levels.
The Tiffen 58 Skylight is popular because customers like the following qualities of the Tiffen 58 Skylight: Clear optics, Firm mount and Strong construction.