Hoya pro 1 digital series polarising filter circular 55mm are designed specifically for use in digital cameras the hoya pro 1 digital circular polarising filter will allow you to remove unwanted reflections from non metallic surfaces such as water glass etc light rays which are reflected by any surface can become polarised so polarising filters are used to select which light rays enter your camera lens this hoya pro 1 digital multi coated filter will also enable colours to become more