Vixen BT81S-A, 81mm Astronomical Observation Binocular With Eyepieces.

Vixen
SKU: VXBT81SAE MFR: 14304P1
Vixen BT81S-A, 81mm Astronomical Observation Binocular With Eyepieces.

List Price: $1,680.00

23% Off

Our Price

$1,299.00
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About Vixen BT81S-A

Magnesium Fluoride coated, air space doublet design, dramatically reduces chromatic aberration for magnificent views. This large aperture, 81mm binocular, delivers crisp, clear images. user is provided with the sharpest images possible.

Vixen BT81S-A Features

  • Twin 900mm f/11.2 achromatic refractor telescopes with 45° incorporated erect image diagonals
  • Interpupillary distance adjustment range of 56-76mm
  • Built-in handle and dovetail (for use with Vixen telescope mounts)
  • Accepts multiple 1.25" eyepieces including Vixen's LV and LVW models

Vixen BT81S-A Specifications

Prism Type
Porro
Magnification
36x (changes with eyepieces being used) [900/eyepiece focal length = magnification]
Objective Diameter
80mm
Angle of View
1.1°
Field-of-View (@ 1000 Yds)
57' (19 m at 1000 m)
Exit Pupil Diameter
2.2mm (changes with eyepieces used)
Eye Relief
22mm (changes with eyepieces used)
Relative Brightness
4.9
Twilight Factor
53.7
Focus Type
Individual
Tripod Socket
Yes
Dimensions
7.5 x 22.8 x 8.5" (19.0 x 58.0 x 21.5 cm) WxHxD
Weight
11.02 lb (5000 g)
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