1.25 Inch 90 Degree Zenith Diagonal Mirror, Mirror Adapter that Erects the Image Prism, Optical for Refractor Astronomy Telescope Eyepiece

1.25 inch diagonal mirror: compatible with 1.25 inch eyepieces and telescopes. Specially designed for refractor telescopes and not suitable for mirror telescopes. 90 DEGREE ANGLE The 90 degree diagonal mirror allows upright images when used with a refractive telescope. Although swapped from left to right, this does not affect astronomical observations. FULLY COATED LENS The fully tempered lens comes with a dust cover. Keep your lens clean to ensure excellent image fidelity. Easy Installation The diagonal mirror of the refractor telescope is easy to install and use. It is inserted into the telescope with a 1.25 inch end and the 1.25 inch eyepiece is attached with a screw. Durability The 90 degree diagonal diagonal mirror is made of metal and plastic, sturdy and not easy to damage.