How important is eye relief?
A. Some observers find eyepieces with short eye relief difficult to use. This includes orthoscopics, Plossls, and some of the modern wide-field eyepieces such as Naglers and Panoptics. Other observers aren’t as bothered by the lack of eye relief. Eyeglass wearers, especially those with astigmatism who cannot simply remove their glasses to look through the eyepiece, may do best with eyepieces specifically designed for long eye relief, such as the Vixen Lanthanums, or with longer focal length eyepieces combined with a barlow.
