Multi-coated optical glass for enhanced optical resolutionFilter UV - protects lens from scratches, dust, dirt, moisture, and fingerprints, while reducing unwanted ulra-violet lightFilter FD - F-DL fluorescent light correction filter gives true-to-life color rendition by removing the harsh yellow-green cast ordinarily resulting from fluorescent bulbsFilter PL - polarize let user achieve vibrant color saturation, reduce or eliminate glare and reflections from non-metallic objects and glass surfaces