Celestron 93691 Stereo Binocular Viewer for Telescopes
Observe for longer periods of timeRubberized coating22 mm BaK-4 fully multi-coated prismsNo vignetting or light cut-offDiopter adjustment readings are well marked1.25 insert barrel is threaded for filtersApproximately 3.5" of back focusRequires the use of two matched 1.25 eyepieces
