Meade 933 45 Degree Erecting Prism

#933 45° Erecting Prism: Typical of most astronomical telescopes, images throughthe ETX-60AT and ETX-70AT appear right-side-up but reversed left-for-right. For astronomical viewing this orientation is of no consequence. However, for terrestrial observing, where a fully correctly oriented image is desirable, the #933 45° Erecting Prism threads on to the telescope's rear cell and accepts an eyepiece of any focal length.

Reader Reviews
Only purchase the Meade 933, 45 Degree Erecting Prism if you want to use your ETX for terrestrial viewing. It doesn't really have a uselful astronomical application and tends only to diminish the quality of the object viewed in space. You don't necessarily need this for terrestrial viewing either unless you desire to see the object in its correct orientation, which is what this item is designed for. Does the job nicely in this respect. Recommended for terresrtrial viewing only.