■ This is an erect prism for terrestrial observation, taken from a discarded Kenko telescope. ■ Please understand that this is a used item. ■ It's a 45-degree type, so it seems convenient for terrestrial observation. ■ There is no dirt on the prism part. ■ If the insertion port size (approx. 24mm) fits, it can probably be used with other telescopes. ♯Telescope ♯Terrestrial observation prism ♯Kenko