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Obsessed with Binoculars®

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Welcome to the World's leading Supplier of High-powered Binoculars

Why Choose a Binocular Telescope?

A Better View Awaits: Explore with Oberwerk Binocular Telescopes

If you have a million-dollar view—or love exploring the night sky—nothing compares to Oberwerk’s XL Series binocular telescopes. Unlike single-eye telescopes, our binocular design offers unmatched depth, clarity, and comfort. With both eyes open, you’ll experience celestial and long-range terrestrial views with greater detail and a more natural perspective.

Woman on a balcony looking through an Oberwerk binocular telescope

The bottom line, then, is that the point of these binoculars isn’t to see the closest, most detailed view of a celestial object, but rather to see a unique view using both eyes at once. Which brings up an important fact: Using both eyes eliminates eye fatigue. I have spent many years looking through telescopes with apertures as large as 24 inches with only one eye. After a while spent staring at an object, my eye got tired; the more I looked, the less I saw. With both eyes, I can look as long as I want. And in this case, the more you look, the more you see.

Tony Hallas, AstroImager, Astronomy Magazine, Feb 2025 reviewing our BT-127-XL-SD

What Sets us Apart?

Uncompromising Quality and Performance

Oberwerk binoculars have a rich history, beginning with the famous “Chinese Border Guard Binoculars” discovered by Oberwerk President, Kevin Busarow, in 1999. Since then, we’ve continuously improved the design, resulting in a more powerful, lighter, and sleeker binocular telescope that offers exceptional optical stability.

Each Oberwerk binocular is crafted with precision and undergoes rigorous collimation before delivery to ensure the highest performance. This guarantees that your binoculars will be perfectly aligned and ready for use as soon as you receive them.

Each Oberwerk Binocular Features:

Magnesium Bodies: Durable, lightweight, and portable

Nitrogen-Filled: Prevents fogging, protects against internal moisture and corrosion, and maintains waterproof seals, ensuring clear, reliable performance in various weather conditions

Fully Multi-Coated Lenses: Made from the finest optical glass to provide superior clarity and performance

5-Year Limited Warranty: Covers any defects in materials or workmanship, so you can confidently enjoy your binoculars for years to come

No Oberwerk binocular leaves our facility in Dayton, Ohio, until it has passed a rigorous quality inspection and precise collimation—only then is it given a serial number to ensure it meets our high standards.

Objective size refers to the diameter of the front lenses on your binocular telescope. The larger the objective, the more light the telescope gathers, resulting in brighter, clearer images—especially in low-light conditions like stargazing or early-morning birdwatching.

Our XL Binocular Telescopes come with a range of objective sizes, from 70mm to 127mm, giving you the flexibility to choose the perfect size for your viewing needs. The larger the objective, the more detail you’ll be able to see, making it easier to observe distant celestial objects or distant landscapes with greater clarity.

The magnification of your binocular telescope is determined by the focal length of the eyepieces you use. The longer the focal length, the lower the magnification; the shorter the focal length, the higher the magnification. Our BT models come standard with 14mm eyepieces, but we also offer optional 7mm and 22mm eyepieces to adjust the magnification to suit your needs.

Oberwerk binocular telescopes are compatible with any standard-size 1.25″ telescope eyepiece, allowing for a wide range of magnification options based on the eyepiece focal length you select.

Focal length	22mm	14mm	7mm
BT-70XL	18x	28x	56x
BT-82XL	20x	32x	64x
BT-100XL	25x	40x	80x
BT-120XL	30x	48x	96x
BT-127XL	30x	46x	93x

A display of Oberwerk binocular telescope eyepieces

When it comes to optics, the quality of the glass is crucial. Both ED (Extra-low Dispersion) and SD (Super-low Dispersion) glass are designed to reduce chromatic aberration, which is the color fringing that appears around bright objects viewed through optics.

What’s the difference?

ED Glass: This high-performance optical material significantly reduces chromatic aberration by slowing down different wavelengths of light as they pass through the objective lenses. The result? Sharper, more color-accurate images.

SD Glass: A more advanced and expensive type of glass that virtually eliminates chromatic aberration, delivering the sharpest, most true-to-life views possible within the binocular’s recommended magnification range. With SD glass, you get the ultimate in optical clarity—perfect for the discerning viewer who demands the highest image quality.

A walnut Oberwerk TR3 tripod in the foreground and a maple Obewerk TR3 tripod in the background

Solid, Beautiful, and Built for Performance

Oberwerk TR3 Hardwood Tripods

Oberwerk’s TR3 hardwood tripods are custom-built and assembled in Dayton, Ohio, from solid American maple (light honey finish) or walnut (dark and rich). These tripods offer exceptional stability and are designed to support our XL Series binocular telescopes with elegance.

Slip-Stop Leg Clamps: Prevent accidental crashes due to humidity changes. The legs are designed with a reverse taper to tighten themselves if the leg clamp slips.

Laser-Engraved Height Scales: For precise, easy height adjustments.

Durable Construction: Non-wood components are made from aluminum and stainless steel for long-lasting performance.

Find the Perfect Setup

Mounting Options for Your Binocular Telescope

We offer a range of mounting options to ensure you get the most out of your binocular telescope setup. Each option is designed to provide smooth, stable performance for your BT model.

Oberwerk Carbon Fiber Elevator with a Nitrotech 608 Head and another example with a Smallrig DH10 Head

Carbon Fiber Elevator with Smallrig DH10 or Nitrotech 608

Carbon Fiber Elevator: Allows for an additional 18″ height adjustment for flexible viewing angles.
Smallrig DH10 Head: All-aluminum fluid head provides smooth azimuth and altitude motion.
Nitrotech 608 Head: With a continuously variable counterbalance system, this is the ultimate head for an easy steering experience.

Oberwerk 240mm XL Fork Mount

Built for smooth stability and effortless adjustments, this mount ensures secure attachment and optimal balance. With a quick-release bayonet adapter, it offers tool-free attachment to any tripod with a 3/8″ stud.

Carbon Fiber Elevator with Smallrig DH10 or Nitrotech 608

Featuring a continuously variable counterbalance system, this head is designed for easy steering and can handle heavier loads with ease, providing stability for more demanding setups.

Oberwerk 280mm XL Fork Mount

iOptron HAZ31

iOptron HAZ31 Go-To Mount: Featuring strain-wave technology, the HAZ31 offers a counterweight-free experience for loads up to 31 lbs.. With its built-in precision level indicator and GPS-based auto-setup, this computerized alt-azimuth mount quickly slews to 212K+ night sky objects.

iOptron HAZ46

iOptron HAZ46 Go-To Mount: The HAZ46 supports up to 44 lbs. without counterweights, offering the same GPS-based auto-setup and tracking features as the HAZ31. It includes an internal rechargeable lithium-ion battery for added convenience, providing extra capacity at a great value.

Need Help Choosing?

Which XL is Right for You

Oberwerk is known for their personalized customer service. Call to discuss your needs and you’ll likely be talking to Oberwerk President Kevin Busarow directly. Since 1999, we’ve been growing our reputation for being Obsessed with Binoculars® one happy customer at a time.

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What Others are Saying

Customer Reviews

Chris Seaton

Verified owner

5/5

I finally had a clear forecast I was determined to get out with my new BT-120XL-SD. A friend had suggested that i come over to his place - he has much more open sky that I do) and observe First of...
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all, I can say that I was very happy overall with the BT-120XL. The telescope is mounted on an iOptron HAZ31, attached via an iOptron mini-pier to an old 2” iOptron heavy duty tripod. I have a ZWO guide camera plus an ASI678 camera and an ASIAir+ attached to the Picatinny rail of the BT, which I use to plate solve and then choose objects for go-to performance. The whole setup worked flawlessly. I would select a target, the mount would slew to it, take an image, plate solve and make any necessary corrections, and the object would be centered. I started out using the Oberwerk 14mm 70º eyepieces that come with the telescope, and the first object was Jupiter. At 48X the view was spectacular. I could see the two cloud bands, as well as the three visible moons. It was sharp and contrasty. I was very impressed by the OB eyepieces. They were much better than I had expected/feared - definitely not a cheap & cheerful throwaway set shipped for free with the binoculars. Next I tried my Astro Tech 10mm UWA’s. At first I was not happy, as I had difficulty for the first time merging the images from each eyepiece. I tried rotating the eyepieces but this did not fix the problem. A bit frustrated, I moved on to my TV 7mm Naglers. The views through them were simply fantastic! Crisp, sharp, and high contrast. Just lovely. I then moved on to M81 and M82, using the OB 14 mms. I was quite pleased to get them both in the field of view and again, quite clear. Of course, they weren’t detailed, but they were definitely better than just “faint smudges”. Did I mention that I really like those OB 14mm’s? I tried, and found M51 and M101, but the views were a bit compromised by the fact that I didn’t have a clear view towards the NorthEast, with some tree branches in the way. I went back to Jupiter and simply basked in its glory! And yes, I really like the OB 14mm’s. From there it was Cluster time. M37 was beautiful, if a little dim, in the 14mm’s. I moved to the 7mm Naglers and it was a revelation, as the extra magnification really helped. What a beautiful sight that cluster is. I decided to give the Astro Tech’s another chance and this time I had absolutely none of the merging difficulties that i had earlier when viewing Jupiter. The view was clear and sharp, and my opinion of them was transformed. I moved on to the Beehive, Starfish, and Pinwheel clusters and in each case the experience with M37 was repeated. I started with the OB 14mm’s, moved to the AT 10’s and then on to the TV Nagler 7’s. All of them were just beautiful. Finally I went to M67. It didn’t matter which of the eyepiece sets I used, i was struck by the 3D nature of the view. It was as if the cluster was just hanging there in the sky, and i felt as if i could just reach out and touch it. It was that tangible! Compared to the views through my friend’s 8” SCT, what i gave up in magnification I more than gained in “crispness/sharpness” and the 3D effect of using both eyes. I spent quite a while just feasting my eyes on that beautiful cluster. After packing up and while driving home i had the opportunity to reflect on the evening and the equipment. The BT-120XL-SD rocks. I am really so very happy with it. Yes, it is big, but that’s a feature, not a flaw. It is not light, but I can manage it. It is beautiful. The finish is absolutely flawless. The binocular effect, binocular summation, or whatever you want to call it is, in my opinion, real, or appears to be, which to me is the same practical thing. I am really happy that I gave the AT 10mm’s a second chance, as they worked flawlessly the second time around and on all the clusters. I have no idea why i had such difficulty on first use with Jupiter. The 7mm Nagler’s were outstanding. And, did I mention that I really liked the OB 14mm’s? Finally, I think that the binoculars can easily handle more magnification than the 96X than I get with the 7mm Nagler. I’m going to have to consider a set of 4-5mm eyepieces. I did not look through my 24mm ES 68º tonight, so I’ll have to see if I really need that wide a field (28X) All in all, a great evening with a great Binocular Telescope. The Oberwerk BT-120XL-SD has made me fall in love with visual astronomy again!.
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2 months ago

BT-120XL-SD

Matt Franzen

Verified owner

5/5

These are my first large binos. After getting a feel for them and getting dialed in was amazed. I live just south of San Francisco, not the best place to look up and see anything. On Feb. 27 2025 I we...
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4 months ago

BT-100XL-ED

Ram K.

Verified owner

5/5

I purchased the BT82XL-ED with the walnut wood tripod about 10 days ago. Absolutely beautiful pair of binocular telescopes. I use it mostly to view over Lake Huron in my backyard - and have had a ch...
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6 months ago

BT-82XL-ED

Vasudevan Jagannathan

Verified owner

5/5

After mounting the BT-100XL-SD with its 14mm eyepieces on a Manfrotto 161MK2B Tripod, and along with some other tracking-related accessories, I pointed the BT toward Jupiter on the night of December 1...
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6 months ago

BT-100XL-SD

Marc Rubin

Reviewer

5/5

Binoculars, like potato chips, are impossible to stop at just one. As a devoted Oberwerk enthusiast, I’ve been collecting their binoculars almost since the company began, and the 127XL is hands down t...
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he pinnacle of my collection. If you’re looking for the best of the best, look no further. Optics Beyond Compare The optical correction of the 127XL is nearly flawless. The light-gathering power is staggering—10 inches of precision glass brings the universe into breathtaking clarity. Think about that: ten inches of light-harnessing brilliance. Nebulae reveal their true colors without a hint of chromatic aberration, even along the lunar limb. That level of performance rivals even the legendary 100mm Takahashi refractors. Ease of Use & Build Quality Collimation? A breeze. Stability? Rock solid. The 127XL is a powerhouse that demands respect, not just for its size but for its sheer quality. It’s a hefty instrument, no doubt about it, so if weight is a concern, consider Oberwerk’s 100mm or 120mm models. But if you’re ready to experience the pinnacle of performance, pair it with the Oberwerk tripod and the nitro head for a perfectly balanced system. Performance Under the Stars This binocular shines under dark skies, where it turns observing into a magical experience: Messier Objects: M27 (Dumbbell Nebula) shows a hint of color; M31 (Andromeda Galaxy) is far more than a mere fuzzball, revealing structure and detail. Globular Clusters: M13 and M92 resolve beautifully; it’s not globular season for M22, but there’s no doubt it would perform just as well. Planetary and Lunar Views: Saturn’s rings resolve nicely depending on seeing conditions, and the Moon is a crisp, stunning sight. Add filters, and objects like the Veil Nebula pop into view with astonishing clarity. The usual suspects—M51 (Whirlpool Galaxy), the Owl Nebula, and Bode’s Galaxy (M81/M82)—look fantastic, especially in Bortle 2-3 skies. A New Frontier Here’s the kicker: I mounted a small astro camera to the 127XL. The result? A giant smile. This binocular isn’t just an optical powerhouse; it’s a gateway to astrophotography and a whole new dimension of stargazing. Who Is This For? If you’re looking for a grab-and-go solution, this isn’t it. For that, consider Oberwerk’s 20x80 LW or Ultra models—or go handheld with their 10x50 or 15x70 binoculars. But if you’re seeking the best of the best, the 127XL delivers an experience that few instruments can match. Final Thoughts The Oberwerk 127XL isn’t just a binocular; it’s an investment in awe. Whether you’re scanning the heavens for nebulae, globular clusters, or galaxies—or pushing boundaries with astrophotography—this binocular delivers on every level. If you can handle the size and weight, you’ll be rewarded with views that will leave you in absolute wonder. I LOVE these binoculars, and I guarantee you will too.
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7 months ago

BT-127XL-SD

A Brand You Can Trust

But, I’ve Never Heard of Oberwerk

Founded in 1999, Oberwerk is the world’s leading supplier of high-power binoculars (capable of 40x or higher magnification), quietly outselling all other brands— combined! All Oberwerk binoculars, from $100 to $6000, are thoroughly hand-inspected and collimated before being shipped, following a strict quality assurance checklist. Read some of our 5 Star reviews. We’ve built a following among amateur astronomers and birdwatchers across the globe.

Our History