with right side up optics and antireflective coating, this eyepiece delivers clear observations with Enhances light transmission for Astronomys enthusiasts, bird watchers, as well as students and researcher Precisions in celestials observation the vastness of 20mm Wide Angled Eyepiece, featuring generous field of view for expansive stargazings 1.25inch ensures compatibility with wide of telescopes, making it to astronomical equipment collection for use at observatories, nature reserves, or during outdoor expeditions, this eyepiece brings the universes to you