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Vixen Optics 25x81 BT81S-A Astronomical Binocular with 20mm SLV Eyepieces

Vixen Optics 25x81 BT81S-A Astronomical Binocular with 20mm SLV Eyepieces

Vixen Optics 25x81 BT81S-A Astronomical Binocular with 20mm SLV Eyepieces

B&H # VIBT81SEP MFR # 14304P1
Vixen Optics 25x81 BT81S-A Astronomical Binocular with 20mm SLV Eyepieces

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Product Highlights

  • Erect Image Binocular
  • 45-Degree Angled Viewing
  • Magnesium Fluoride Coated
  • 2.0° Angle of View
  • Two 20mm SLV-Series 1.25" Eyepieces
  • Individual Focus
  • Carry Handle
  • Finder Bracket
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Options: Eyepiece Package

Eyepiece Package Mount/Tripod/Acc'y Package

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Mount/Tripod/Pro Acc'y Package

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Optic Only

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Aperture: 81mm

70mm

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81mm 126mm

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Price:  $1,450.00

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Overview
  • 1Description

The 25x81 BT81S-A Astronomical Binocular from Vixen Optics features interchangeable eyepieces that provide exceptional terrestrial or celestial observing. The twin 480mm f/5.9 achromatic refractors have permanently attached 45° diagonals and accept any 1.25" eyepieces. With a broad 56-101mm interpupillary adjustment range this powerful optic will fit 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 erect-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 two Vixen 20mm SLV-series eyepieces. The eyepieces are fully multicoated, with long eye relief and twist-up eyecups. A required mount and a tripod or base need to be supplied by the user.

Apparent angle of view: 50°
Accepts any 1.25" eyepieces
Visual back 31.7 mm - friction fit
Built-in carry handle and finder bracket
Mount block dovetail bar for SX/GP tripods
Interpupillary distance adjustment range of 2.2-4.0"
Two fully multicoated Vixen 20mm SLV-series eyepieces with pop-up eyecups
Twin 480 mm f/5.9 achromatic refractor telescopes with 45° incorporated erect image diagonals
In the Box
Vixen Optics 25x81 BT81S-A Astronomical Binocular with 20mm SLV Eyepieces
  • 2 x 20mm SLV Series 1.25" Eyepiece
  • Mount Block
  • Lifetime Transferable Warranty
  • Table of Contents
    • 1Description
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    Specifications
    Magnification 25x
    Objective Lens Diameter 81mm
    Angle of View 2.0° (actual)
    Field-of-View 105' @ 1000 yd / 34.86 m @ 1000 m
    Minimum Focus Distance Not Specified By Manufacturer
    Exit Pupil Diameter 3.24  mm
    Eye Relief 19.5  mm
    Interpupillary Adjustment 55.88 - 101.60 mm / 2.2 - 4.0"
    Dioptric Correction None
    Focus Type Individual
    Tripod Mount None
    Dimensions 18.9 x 7.4 x 6" / 48.01 x 18.80 x 15.24  cm
    Weight 9 lb / 4.08 kg

    optical assembly only

    Packaging Info
    Package Weight 15.0 lb
    Box Dimensions (LxWxH) 29.0 x 13.0 x 12.0"

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