This precision 90-deg star telescope diagonal features fully coated prisms, delivering superior image fidelity. Features a machined aluminum eyepiece holder and a chrome-plated metal barrel that's threaded for filters. The eyepiece holder has a setscrew for locking the telescope eyepiece securely in place. It 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" focusers and accepts 1.25"-diameter eyepieces.

Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.