Feature●➤Erect Image,For superior image fidelity and maximum light throughput.Effectively reduce the light loss of your light during transmission to improve the brightness and color saturation of the image.Even if you want to observe wildlife or other scenery during the day.●➤This diagonal can correct upside down and left-right reversed image easily, which allows you view things during daytime in correct position.●➤High-quality prism diagonal provides a comfortable and sharp 45 degree viewing orientation for great daytime terrestrial views and night time astronomy applications for telescopes.●➤Diagonal Mirror,Fits for 1.25inch telescope eyepiece and focuser. Plastic body with optical glass lens, providing clear and sharp image.●➤Mirror has dust cover keeping the lens clean,so that provides clear and sharp images and extends the service life Easily correct upside down and left-right reversed image;It produces an image that is oriented properly.Description Diagonal Mirror,Fits for 1.25inch telescope eyepiece and focuser. Work with Refractor and catadioptric telescopes.Plastic body with optical glass lens, providing clear and sharp image.