1.25-inch / 2-inch 68° Apparent Field of View ocular with good image sharpness
A comfortable view - easily visible even with eyeglasses. A field of view of 68 degrees has been tested as being ideal for astronomical observations. It is the largest field of view that can be viewed without strain and turning your eyes. Excellent Image Sharpness both on axis and over the entire visible field these eyepieces offer an excellent image sharpness. Even short focal ratio Newtonians at an extreme f/4.5 offer good, sharp stars over the entire field.
Very good light throughput and contrast, Hyperion eyepieces have an excellent multi-layer coating on each glass-to-air surface. Blackened lens edges and a blackened interior of the eyepiece body further reduce internal reflections and ghost images. No Kidney-Beaning Cheap eyepieces and too extreme wide angle eyepieces often suffer from "Kidney-Beaning". When you move the head only slightly a black, kidney-shaped shadow will cover a part of the field of view.
1.25" and 2" Dual Barrel Hyperion eyepieces do not only have a 1.25" barrel.