Zomei&reg; Square Z-PRO Series Filter Holder Support + Adapter Ring 82mm Compatible with Cokin Z-PRO Series, need to work with Z Series holder and adapter ring. Recommended for: SLR or Full Frame or APS-C D-SLR cameras with wide-angle lens from ?72. Filter holder to lenses with a 82 mm filter thread The filter holder can hold up to 3 Z-PRO Series filter at the same time.