Baader Planetarium Hyperion 13mm 1.25" Eyepiece HYP-13 Baader Hyperion Eyepiece, 13mm (#HYP-13), wt 390g (13.8oz) Modular 1.25" and 2" dual barrel eyepiece 68 apparent field of view with 20mm eye relief 8 lens elements in 5 groups, fully multi-coated