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Vixen Optics BT125-A 34x125 Binocular with Fork Mount & Tripod

B&H # VIBT125EPT MFR # 5835P2
Vixen Optics BT125-A 34x125 Binocular with Fork Mount & Tripod


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Product Highlights

  • 45-Degree Angled Viewing
  • Porro Prism
  • 1.9° Angle of View
  • Uses 1.25" Eyepieces
  • Individual Focus
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You Pay: $4,599.00

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The Vixen BT125-A astronomical observation binocular, with its interchangeable eyepieces and enormous light gathering power, is an undeniably great setup for high-powered observations both celestial and terrestrial.  Unlike its little brother the BT80M, this doesn't have shorter refractors with built-in barlow lenses-instead, the BT125-A has a pair of 760mm f/6.08 achromatic refractors (instead of 450mm + incorporated barlows), allowing it to have both wider fields of view with longer eyepieces and a higher maximum useful magnification thanks to its broad 125mm objective lenses.  And all the while you'll be astounded with the light gathering power that's more than 300x greater than human eyes.  Imagine the views of the Milky Way!

The BT125-A has permanently attached 45° prisms, to make for comfortable observing whether you're looking at stars or earthbound objects.  It accepts the entire lineup of Vixen Lanthanum & Lanthanum Wide 1.25" eyepieces-both older and "NLV/NLVW" series.  Because of its capacity for wide angle viewing, however, you'll likely enjoy using the Lanthanum Wide eyepieces the best.

For its 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, in a package which isn't difficult to transport to your favorite dark sky location out beyond.  Take a drive to nowhere on a clear, new moon night and be amazed!  You might even see a comet.

This version of the BT125-A comes with two NLV Lanthanum 25mm eyepieces, which yield a generous 1.9° viewing angle at 34x magnification, as well as a fork mount, half pillar, and the HAL130-GP tripod.  Vixen's fork mount attaches directly to the sides of the BT-125A; no swing bracket is required.  And if you'd like to have automated "GO-TO" observing of celestial objects, the incorporated bracket and included tripod can be combined with Vixen's Sphinx SXD mount.

Twin 760mm f/6.08 achromatic refractor telescopes with 45° incorporated erect image diagonals
Interpupillary distance adjustment range of 56-76mm
Built-in handle and dovetail (used with Vixen mounts) with three 1/4"-20 threaded sockets
Accepts 1.25" eyepieces including Vixen's LV & LVW models (two NLV 25mm eyepieces included)
Fork mount can be angled back 45° for less obstruction during zenith viewing
Prism Type Porro
Magnification 34x
Objective Lens Diameter 125mm
Angle of View 1.9° (actual)
Field-of-View 100' @ 1000 yd / 33.20 m @ 1000 m
Minimum Focus Distance Not Specified By Manufacturer
Exit Pupil Diameter 3.7  mm
Eye Relief 20  mm
Interpupillary Adjustment Not Specified By Manufacturer
Dioptric Correction Not Specified By Manufacturer
Focus Type Individual
Tripod Mount Yes
Dimensions Not Specified By Manufacturer
Weight 25.8 lb / 11.70 kg excluding tripod mount
Packaging Info
Package Weight 14.35 lb
Box Dimensions (LxWxH) 29.0 x 13.0 x 12.0"
Vixen Optics BT125-A 34x125 Binocular with Fork Mount & Tripod
  • 2 x NLV Lanthanum 25mm Eyepiece (1.25")
  • Fork Mount Manual Altazimuth Mount with Half Pillar
  • Swing Bracket
  • HAL130-GP Aluminum Tripod
  • Lifetime Transferable Warranty
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    Eyepieces, Doublers, Finderscopes

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    Required item: Two eyepieces are required but not included with this binocular.

    Vixen Optics - 2.5mm SLV Series 1.25" Eyepiece
    • You Pay: $169.00
    Special Order ?
    This item is usually Drop Shipped from the MFR/Distributor within 7-14 business days (subject to availability). Your order will be charged at the time of placing the order with the MFR.
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    PayPal orders will be charged when the order is placed.
    International Orders
    For international orders, credit cards will be charged at time you place your order.

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    Keep your optics in pristine condition with the right case, protection or pack.

    Pelican - 1660 Case with Foam (Desert Tan)
    • You Pay: $299.95

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    Carson - HookUpz Binocular Adapter for iPhone 6
    • You Pay: $19.34

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    LensCoat - Camera/Binoculars Harness (Webbing Version)
    • You Pay: $14.99

    Cleaning & Anti-Fog

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    Protect your optics with Cleaning & Anti-Fog products.

    Pearstone - Microfiber Cleaning Cloth, 18% Gray (7 x 7.9")
    • You Pay: $4.99
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