HOYA Digital Filter Kit brings 3 main filters in one package which frequent use at the time of photography and is a kit for economic guides. Three kinds of next filters are packed in a filter porch. UV(C) filter A UV(C) filter is used to intercept UV light and is done a general protection of the lens. Made of high quality UV cut and anti-reflective coat is given both sides. It will not affect the quality of your image. Circular Polarizer filter A circular polarizer filter is a basic filter with polarization effect to eliminate unwanted reflections or to enhance contrast of the sky and nature objects. Its frame thickness is slim than a previous Filter Kit One. NDx8 A ND(Neutral Density)8 filter reduces the light quantity for 3-stops and is equivalent to 8 times longer shutter speed. It is to wider aperture during shiny day or to imitate blur motion of the water and moving objects. This filter is effective to avoid the diffraction phenomenon which occurs by slow iris. Filter factor 8, Transmissivity 12.5%, Density 0.9 f/stop 3