These Sky-Watcher Ultra-Wide Angle, Multi-Coated, Long Eye Relief eyepieces offer a generous 66º apparent field of view, allowing more sky objects to be viewed at one time. They provide sharp images right across the field. Rubber eyegaurds are included for viewing comfort and to exclude extraneous light. These eyepiece designs offer far more comfort than traditional Plossls and Orthoscopics. A nice general purpose focal length eyepiece that gives great views through virtually any telescope.