Celestron - 7.5mm Ultima Series Eyepiece 1-1/4 inch

Rated as best in their class by Sky and Telescope magazine, the Ultima
eyepieces use a 5-element hybrid optical design. They feature long eye relief
and a wide field, and each air-to-glass surface is fully multicoated to
enhance contrast levels. These special eyepieces are computer designed to
keep visual aberrations to an absolute minimum. They virtually eliminate the
following aberrations: spherical, color, field curvature, coma, astigmatism,
distortion and spherical distortion of the exit pupil. The inside surfaces
and edges of all lenses are blackened, to keep out reflected light. Outside
surfaces are flat black, with rubber grips for secure handling. Rubber
eyecups are included both for comfortable use and to keep out extraneous
light. Threaded barrels accept Celestron 1-1/4” thread-in filters. Lens and
barrel caps are included for safe storage.