Designed with a fully multicoated 8-element/5-group lens configuration, the Celestron Ultima Edge 24mm Flat Field Eyepiece produces bright and clear views with crisp and sharp resolution across the wide 65° field of view—even at the extreme edges. The eyepiece's focal length produces a low magnification for wide-field observations of large deep-sky objects like nebulae and clusters or for observing the moon and planets without being distracted by excessive vibrations. This Ultima Edge has a 1.25" barrel that makes it compatible with popular diagonals, Barlows, and visual backs with standard threads for filters. A textured collar makes inserting and removing the eyepiece easy, and the combination of exceptional 29mm eye relief and fold-down rubber eyecup make it comfortable to use with or without eyewear.