The HOYA Digital Filter Kit II includes 3 main filters in one package that are commonly used in photography. The set contains: UV(C) Filter. A UV(C) filter is used to capture UV light and provides general protection for the lens. It is made with a high-quality UV cut and anti-reflective coating that is applied on both sides. Circular Polarizer (CIR-PL). A circular polarizing filter is a basic filter with a polarization effect to eliminate unwanted reflections or enhance the contrast of sky and nature objects. NDX8. An ND (Neutral Density) 8 filter reduces the amount of light by 3 stops, corresponding to an 8 times longer shutter speed. By using this filter, it is possible to achieve the effect of blurred motion of water or moving objects even with a wide aperture. The ND8 filter is also suitable for filming in bright environments with a fixed shutter speed and open aperture. Filter factor 8, transmissivity 12.5%, density 0.9 f/stop 3.