Features: 77 mm diameter mount only for 77 mm lenses. This is a cool photographic tool to highlight your photos without special effects or photoshop. Made of high-quality, solid optical glass material, which offers a great value in clarity and transparency. A surprise prism as photo accessories to create cool refractive effects in your photos. With this glass prism, you can shoot some interesting effects. Focal lengths of aperture : (35mm-85mm) are recommended. In people, landscape, night scenes and other scenes,hoping you can play more unexpected tricks. Package Includes: 1x Kaleidoscope Prism 1x Pouch Specifications: Material: Glass Diameter: 77mm Focal length: 35mm-85mm Color: Red/White note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.