Vixen Optics BT-81S-A Astronomical Binocular and Berlebach Tripod

Vixen Optics BT-81S-A Astronomical Binocular and Berlebach Tripod

Vixen Optics BT-81S-A Astronomical Binocular and Berlebach Tripod

Vixen Optics BT-81S-A Astronomical Binocular and Berlebach Tripod

Show MoreLess


Now Viewing:

No Longer Available

Product Highlights

  • Large 80mm Objective Lenses
  • Built-In 45° Erect-Image Prisms
  • Anti-Reflection Multi-Coated Optics
  • Two 20mm SLV-Series 1.25" Eyepieces
  • Accepts Any 1.25" Astronomical Eyepieces
  • Individually Focusable Oculars
  • 3-Way Head with Control Handle
  • Ash Wood Tripod with Accessory Tray
  • Adjustable Height and Leg Spread Angle
Show moreShow less

Enter to win a $1000 B&H Gift Card!

Share a favorite product for chances to win one of four $1000 B&H Gift Cards! 1 new winner announced every Monday starting Nov 13th!
Limit 1 entry per day; Come back every day to increase your chance of winning!

Be sure to mention #BHWishList when you share!

Share on Twitter

First winner announced on Nov 13th

Official Rules


NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B & H $1,000.00 Giveaway (the "Giveaway" or "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about November 6, 2017 until on or about December 4, 2017 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share any product found on the B&H website on Facebook or Twitter via the dedicated links therein ( and mention #BHWishList; or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment) (optional) to: B&H $1,000.00 Giveaway, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total four (4) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $1,000.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize at the email address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the email account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An email account holder shall mean the natural person assigned to such email account by the internet access or online service provider or other organization responsible for assigning email addresses for the domain associated with such email account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $1,000.00 Giveaway Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $1,000.00 Giveaway, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

Let us know how to reach you if you win!

Privacy 100% guaranteed; email address for contact purposes only


Already have a B&H account? Just log in tomorrow to enter again!

  • 1Description

Providing awe-inspiring views of comets, star clusters, the Moon, and many other celestial subjects, the Vixen Optics BT-81S-A Astronomical Binocular and Berlebach Tripod provides users with a complete observational rig for both astronomical and terrestrial viewing. Its large 81mm aperture and 480mm focal length make this a powerful optic, and with twin 1.25" eyepiece holders, you can use any telescope eyepieces to tailor the magnification to the specific demands you put on it. To get you observing right out of the box, Vixen gives you two 20mm SLV-series eyepieces which yield 24x magnification. Anti-reflection fully multi-coated optics and achromatic lens system ensures bright and clear high-contrast images with rich color rendition.

The binoculars mount on the included head that is capable of tilting 180° forward and back so it's ideal for both astronomical and terrestrial viewing, especially if the binocular is set on a balcony, and you're looking down at a boat or bird. The included tripod is produced by Berlebach in Germany and made of solid ash wood, with a matching tray that not only keeps small accessories safe but locks the legs at a 23° angle for increased stabilization and vibration reduction. The legs lock into multiple angles to accommodate uneven terrain, and the leg height is adjustable for comfortable use by a wide range of users. This tripod not only offers a rock-steady observational base for a wide range of users, it also presents a refined and elegant look.

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

    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
  • StarGuy Tripod with 2-Way Tilt Head

    The StarGuy Tripod with 2-Way Tilt Head from Vixen Optics is composed of Berlebach Tripod Report 212 and 2-Way Tilt Head.

    The Tripod Report 212 has a load capacity of 44.1lb and has adjustable leg spread at angle of about 20°, 40°, 60°, 80° and 100°. It features a mounting head with 1/4"-20 standard spring-mounted fastening screw. The deposit tray is included and the practical tray for small items fits between the tripod legs to provide additional stability. It provides vibration damping.

    The 2-Way Tilt Head comes integrated with quick release-coupling and can be quickly mounted to 90° offset using the added hexagon socket wrench. In this way, you can use this head as 3-way tilt head without limitation by means of an elbow that is attached to the camera. You can lock both planes thanks to the mechanical system via one sole clamping element. The friction adjustment for the vertical tilt is made via an adjusting wheel opposite to the clamping element. The guide handle is mountable for both right and left handed persons. Besides capturing images, this tilt head is particularly suitable for observations with a spotting scope or with binoculars.

  • 25x81 BT81S-A Astronomical Binocular with 20mm SLV Eyepieces
    Magnification 25x
    Objective Lens Diameter 81mm
    Angle of View 2.0° (actual)
    Field of View 105.0' @ 1000 yd / 35.0 m @ 1000 m
    Minimum Focus Distance Not specified by manufacturer
    Exit Pupil Diameter 3.24 mm
    Eye Relief 19.5 mm
    Interpupillary Adjustment 8.7 - 15.7 mm / 22.0 - 40.0"
    Dioptric Correction None
    Focus Type Individual
    Tripod Mount None
    Dimensions 18.9 x 7.4 x 6.0" / 48.0 x 18.8 x 15.2 cm
    Weight 9 lb / 4.1 kg

    optical assembly only

    Packaging Info
    Box Dimensions (LxWxH) 29.0 x 13.0 x 12.0"
  • StarGuy Tripod with 2-Way Tilt Head
    Load Capacity 44.1 lb (20 kg)
    Transport Length 29" (74 cm)
    Height Minimum: 3" (8 cm)
    Maximum: 44" (112 cm)
    Weight 6.2 lb (2.8 kg)
    Thread Bottom: 3/8" (threaded socket to 1/4" is included)
    Load Capacity 11 lb (5 kg)
    Height 3.5" (9 cm)
    Weight 1.54 lb (0.69 kg)
Be the first to review this item
See any errors on this page? Let us know.