This listing is for phot r slim uv ultra violet filter phot r circular polarising filter and phot r front lens cap the uv filter is a general use clear filter that helps to absorb ultraviolet light and reduce bluish cast of daylight it is useful as a general protective filter to leave on lenses at all times filters help to reduce dirt and moisture from reaching your lens element and provide additional protection in case of accidental damage the circular polarising filter helps to reduce r