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12.5mm crosshair eyepiece
OPTs service was great as always. It's a 12.5mm eyepiece, it has an illuminated crosshair. Useful for aligning finders and drift checking polar alignments. The eyepiece has a decent amount of eye relief, which I find very useful with eyesight that's starting to fade. If you need an illuminated reticle, this one is of pretty good quality.