Kenkos mc uv filters absorb the ultraviolet rays which often makes outdoor photographs hazy and indistinct absorbs excess blue from sea sky and high altitude shots a muliti purpose fine weather filter for color as well as black and white films also serves as a permanent lens protector and a much cheaper alternative to the hoya equivalent a uv filter in photography is transparent to visible light and so can be left on the lens for nearly all shots uv filters are among the least expensive