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Vixen Optics 25x81 BT81S-A Astronomical Binocular w/ 2 SLV20 Eyepieces ( Award Winning Binocular Telescopes)
Vixen Optics 25x81 BT81S-A Astronomical Binocular w/ 2 NPL25 Eyepieces

Vixen Optics 25x81 BT81S-A Astronomical Binocular w/ 2 SLV20 Eyepieces ( Award Winning Binocular Telescopes)

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Your Price: CAD2,046.45
Retail Price:CAD2,128.31

Your Savings:CAD81.86(4%)

Generally Ships in 5-7 Business Days
Part Number:14304P1

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The 25x81 BT81S-A Astronomical Binocular w/ 2 NPL25 Eyepieces from Vixen Optics is an astronomical observation binocular with interchangeable eyepieces providing 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 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 25mm NPL Plössl eyepieces. The eyepieces are fully multicoated with pop-up eyecups. A required mount and a tripod or base need to be supplied by the user.

  • AAoV of 50°
  • Accepts multiple 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 25mm NPL Plössl eyepieces with pop-up eyecups
  • Twin 480 mm f/5.9 achromatic refractor telescopes with 45° incorporated erect image diagonals
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 1
Please Note:
optical assembly only
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In the Box
Vixen Optics 25x81 BT81S-A Astronomical Binocular w/ 2
SLV20 Eyepieces
  • 2 x SLV20mm Eyepiece (1.25")
  • Mount Block
  • Lifetime Transferable Warranty
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