Description: Strong practicability: 77mm diameter bayonet, only suitable for 77mm lens. This is a cool photography tool that can make your photos different without using any effects or Photoshop. Advantages: 150 mm diameter bayonet, only for 150 mm lens. This is a cool photography tool, which can make your photos out of the ordinary without using any effect or Photoshop. Equipped with a connecting ring: can be connected to other diameters of the lens. It's also a new way to see the world. You can see new landscapes and nightscape. As a surprise prism gift for photographic accessories, you can create cool refraction effects in photos. Using this glass prism, you can get some interesting results. In the scene of characters, landscapes, nightscape and so on, I hope you can play more unexpected tricks. Boutique: our glass filter screen will go through a comprehensive inspection before delivery to ensure that the glass filter screen in each consumer's hand is not defective or damaged. Specification: Material: Glass Diameter: 77 mm 150mm Package Includes: 1 piece 77mm special mirror 1 piece 150mm Half Moon special mirror