Astromania Telescope Eyepiece 1.25 inch HD Fully Multi Coated Telescope Accessory, 66 Degree Ultra Wide Angle Eyepiece for Astronomy Telescope, Long Eye Relief HD 15mm Wide Angle Telescope Eyepiece

Professional & Precise Detailed Design: All metal alumnium construction for long time use; Equipped with two dust-cover for better protecting eyepiece; blackened lens edges eliminate light scattering and minimize internal reflection with maximize contrast Comfortable Eye Relief & Adjustable Eyecup: Generous 13mm eye relief with 15mm focal length allows comfortable viewing distance during astronomical; fold-down rubber eyecup design more fit the glasses wearer that prevent stray light entering when using 66 Degree Ultra Wide Angle Eyepiece: Provide impressive optics with an enormously wide 66 degree apparent field of view (AFOV); Perfect for clearly observing planets or deep sky objects and offering expansive views of moon star clusters and Milky Way Advanced 4-Element HD Optics: Precision-engineered with muti-coating optical system are characterized by highly effective coatings and high light transmission, which delivers sharper and clearer observed images with better color correction and contrast Universal 1.25 inch Compatibility: Equipped with 1.25-inch (31.75mm) compatible with all standard 1.25" focusers of telescope; diagonal mirror ; barlow lens and other telescope accessories; Included standard 1.25” filter thread connect to telescope filter