This high power 10mm, high eye-relief eye-piece allows you to use your refractor, (without a diagonal, reducing in-focus!) or your reflector for upright, correct-image observing. It contains a built in porro-prism.
No need to reverse star charts and is great for terrestrial observing.
Fully coated, sharp optics, rubber eye-cup. It's an excellent performer.
Thanks for looking.