Overview This NiSi Circular Starter Filter Kit contains two filters that are compatible with lenses that feature 77mm front filter threads. They can be used individually or in combination to improve the results of your photography. Included is a general-use, clear filter designed to absorb ultraviolet light and reduce the bluish cast of daylight, and a circular polarizer filter that helps to reduce reflections as well as glare by filtering out light that has become polarized due to reflection from a non-metallic surface. A filter pouch is included to store and transport this filter kit. It features four padded, nonabrasive pockets plus a touch-tab-fastened closure.