The eyepieces are fully coated for maximum contrast. These are Celestron's top of the line eyepieces, utilizing a hybrid design of five elements. These special eyepieces are computer designed to keep visual aberrations to an absolute minimum.
Outside surfaces are flat black, with rubber grips for secure handling.
Rubber eyecups are included both for comfortable use and to keep out exttaneous light. Threaded barrels accept Celestron thread-in filters. Lens and barrel caps are included for safe storage . All focal lengths have a comfortable 20mm of eye relief. These eyepieces also feature soft rubber eyecups, rubber coated bodies, and fully multicoated lenses for optical excellence.