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This is a used Orion 1.25" Prism Star Diagonal. It is in very good condition: the mirror is clean, and the body shows only slight signs of use.
- For astronomical use, this diagonal produces an image that's right-side-up, reversed left to right.
- Fully coated prisms for superior image fidelity.
- Accepts 1.25" telescope eyepieces.
- Useful for refractor and Cassegrain telescopes - not recommended for reflectors. Makes it easier to navigate the night skies with a telescope.
This precision 90° star diagonal for telescopes features fully coated prisms, delivering superior image fidelity. Its 90-degree shape makes it perfect for nighttime stargazing, since it places the telescope eyepiece at a comfortable viewing angle. The Orion 1.25" Prism Star Diagonal's eyepiece holder is made of machined aluminum and its nosepiece is a chrome-plated metal barrel that's threaded for like-sized 1.25" eyepiece filters. The eyepiece holder has a setscrew for locking the telescope eyepiece securely in place. This diagonal produces an image that is right-side up and reversed left to right (therefore, not recommended for terrestrial observing). Diagonals are not recommended for use in reflector telescopes. Fits in 1.25" telescope focusers and accepts 1.25"-diameter eyepieces.