- Universal compatibility: This 1.25 inch diagonal mirror is designed to fit both 1.25 inch eyepieces and 1.25 inch telescope focusers, providing a secure and reliable connection across a range of telescope models. - Optimized for refractor and catadioptric telescopes: Specifically developed to deliver optimal performance with refractor and catadioptric designs. It is not compatible with mirror telescopes. - Large 90 degree viewing angle: The wide 90 degree angle allows you to comfortably view an inverted image from a refractor telescope on a tripod, promoting a natural eye position and reducing neck strain. - Easy installation and user-friendly: Install quickly by inserting the diagonal into the 1.25 inch telescope at the silver end and then attach the 1.25 inch eyepiece to the other end using the screw. - Use scenarios: - Refractor telescope on a tripod for extended viewing sessions: The 90-degree angle minimizes neck strain for comfortable, longer stargazing. - Catadioptric telescopes in small or portable setups: Simple to swap eyepieces and maintain alignment with standard 1.25 inch components. - Field observations with a lightweight, portable tripod: Quick setup and dependable performance in remote observing sessions.