The AGFA digital multi-coated circular polarizing (CPL) filters are the perfect compliment for your lenses. Light rays which are reflected by any surface become polarized and these high quality filters are used to select which light rays enter your camera lens. It allows you to remove unwanted reflections from non-metallic surfaces such as water, glass, etc. It also enables colors to become more saturated and appear clearer. It makes the sky bluer and the clouds whiter. They also protect your lens. 67mm