Shoemst Astronomical Telescope Eyepiece Prism 90 Degree Lens 1.25In Diagonal Mirror Prism For Refractor Cassegrain Telescope

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Astronomical Telescope Eyepiece Prism 90 Degree Lens 1.25IN Diagonal Mirror Prism for Refractor Cassegrain Telescope.Feature: 1. Fit for 1.25in focuser stand and eyepiece. 2. 90 degree erecting lens images upside down but left right corrected. 3. Work well with refractor, Cassegrain and catadioptric telescope but not recommended for reflector telescope. 4. With dust cover to keep the lens clean for crisp viewing and long time service. 5. Just simply insert the erecting lens into 1.25in focuser a