Celestron 45° Full Metal Erect Image Zenith Mirror Astronomical Telescope New

Luckily, this is an easy problem to correct. Now, when you insert an eyepiece, objects will be right side up and left-to-right correct. Model: 45° erect zenith mirror. 1 45º Erect Image Diagonal. Adding an erect-image diagonal to a Newtonian reflector will not result in images that are right side up and left-to-right correct.

eBay