Baader's 12.5mm Morpheus eyepiece has a full 76-degree apparent field of view for an immersive astronomical viewing experience. This premium astronomy eyepiece provides a long 20mm eye relief to allow a comfortable viewing position, even for observers who wear eyeglasses. The careful and sophisticated optical design of this eyepiece, which includes 8 lenses in 5 groups, enables superb visual images of stars, galaxies, nebulae, star clusters, and other astronomical objects with minimal distortion right to the edge of the field of view. This compact and lightweight eyepiece weighs only 12.2oz. These eyepieces are designed for years of trouble-free field use and feature a weather-sealed housing to keep dust and moisture out. When used in a matched pair, Morpheus eyepieces work well in astronomy binoviewers (not included) for a comfortable two-eyed viewing experience. The eyepiece also features a M43 adapter thread to enable astronomical imaging through the eyepiece itself (requires Baader M43-T2 adapter or Baader Hyperion Digital T-rings, both sold separately).