The Hoya Digital Filter Kit II contains 3 main filters in one pack, which are very frequently used in photography. Included in the set are: A UV(C) filter is used to intercept UV light and provides general lens protection. Manufactured with a high quality UV cut and anti-reflective coating applied to both sides. A circular polarising filter is a basic filter with a polarising effect to eliminate unwanted reflections or improve the contrast of celestial and natural objects. NDX8 An ND (neutral density) 8 filter reduces the amount of light by 3 f-stops and corresponds to an 8x slower shutter speed. By using this filter, it is possible to achieve the effect of blurred movement of water or moving objects despite an open aperture. The ND8 filter is also suitable for filming in bright surroundings with a fixed shutter speed and open aperture. Filter factor 8, transmissivity 12.5%, density 0.9 f/stop 3.