VIBT81S

ES14304

Vixen Optics

The 81mm BT81S-A Astronomical Binoculars - OTA from Vixen Optics are astronomical observation binoculars allowing interchangeable eyepieces that provides exceptional terrestrial or celestial observing. The twin 480mm f/5.9 achromatic refractors have permanently attached 45 diagonals. They accept the entire lineup of Vixen NPL Plossl eyepieces and have an enormous 56-101mm interpupillary adjustment range to work with nearly any set of eyes, including many children's.For remarkable depth perception and contrast, there is nothing that beats the ease and comfort of upright-image binocular viewing. Expect high quality observing of terrestrial vistas and celestial views alike which is easily transported to your favorite dark sky location out and beyond. Take a drive to nowhere on a clear, new moon lit night and be awe struck! The Pleiades and the Moon's terminator never looked like this.This permutation of the BT81S-A arrives with the binocular optical tube assembly (OTA) only. Eyepieces, mount, and a tripod or base need to be supplied by the user.None Accepts multiple 1.25" eyepiecesNone Visual back 31.7mm, friction fitNone Built-in carry handle and finder bracketNone Mount block dovetail bar for SX/GP tripodsNone Interpupillary distance adjustment range of 2.2-4.0"None Resolving power of 1.43 arc seconds and light gathering value of 134xNone Twin 480mm f/5.9 achromatic refractor telescopes with 45 incorporated erect image diagonals