If there is only one accessory you will purchase for the lens of your camera or camcorder, this should be the one.
A UV filter serves to protect your lens from all dust, dirt, scratches and fingerprints.
It also absorbs the Ultraviolet rays of the sun thereby reducing or eliminating distortion. The ultraviolet-blocking filter effectively reduces or eliminates photographic haze in areas where the atmospheric conditions contain a heavy concentration of dust particles, water droplets, and pollution. Such conditions - often found in mountainous or coastal regions, and industrial areas - scatter light and produce a bluish cast that causes a lack of color, contrast and overall image quality. Filtering out ultraviolet light enables the capture of vivid colors and sharper detail.
Vivitar filters are manufactured from the finest solid optical glass, and are heat treated and multi-coated to ensure optimum picture quality.