Product Description This is a kind of quality kaleidoscope prism, which is made of quality optical glass and hardware. 77mm filter, only for 77mm lens. You can connect with adapter rings to convert them into lenses in other diameters. With this glass prism, you can get some interesting effects while taking a photo. Specifications: Material: optical glass+hardware Diameter: 77mm and 82mm (82mm now only available for few items) Package size: 90*90*20mm Package weight: 222g / 7.83ounce Packing List: 1 * Filter