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Explore Scientific 28x100mm BT-100 SF Large Binoculars w/ 62 Degree LER Eyepieces

SKU 01-14220
Sold out
Original price $1,999.00 - Original price $1,999.00
Original price
$1,999.00 - $1,999.00
Current price $1,999.00
Out of stock

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Explore Scientific BT-100 SF Large Binoculars with 62 Degree 20mm LER Eyepieces - 01-14220

Introducing the Explore Scientific 28x100mm BT-100 SF Large Binoculars with 62 Degree LER Eyepieces, these colossal binoculars are your portal to celestial and terrestrial wonders.

With a massive 28x magnification, they bring distant subjects into sharp focus, offering meticulous exploration.

These binoculars feature an 82mm objective lens and a 480mm focal length, ensuring exceptional light capture for vivid and detailed magnification.

From capturing the beauty of the night sky, including star clusters, nebulae, and the moon's craters, to observing earthly landscapes, these binoculars excel in diverse environments, delivering versatility in your observations.

Built for rugged outdoor use, these binoculars are sealed and nitrogen-filled, preventing fogging even in challenging weather conditions.

Their magnesium housing keeps them lightweight and easy to handle, while two Explore Scientific 20mm eyepieces of the 62-degree LER series are included, enhancing your viewing experience with their wide field of view and long eye relief.

Interchangeable eyepieces with a 1.25-inch / 31.7mm plug-in diameter allow you to customize your magnification and field of view.

Recommended are Explore Scientific eyepieces of the 62 and 82-degree series with focal lengths ranging from 8 to 26mm, enabling magnification adjustments from 21x to 70x.

Enhance astronomical observations using color and nebula filters, screwing them directly into the eyepiece sleeves.

Pairing these filters optimizes contrast and visibility for celestial objects.

The binoculars feature a comfortable 45-degree viewing angle, adjustable interpupillary distance, and precise helical individual focusing for effortless and relaxed observations.

Extendable dew caps prevent lens condensation during humidity or cold conditions and shield against stray light interference.

Transporting and securing the binoculars is made easy with an integrated metal carrying handle.

For the most stable and detailed observations, use a sturdy photo tripod with the binoculars, connecting them via two 1/4-inch or one 3/8-inch threaded holes in the tripod adapter.

The optional Explore Scientific U-Mount with field tripod is specifically designed for these binoculars, offering safe and vibration-free support even at high magnification, enabling you to observe the finest details with precision.



  • 28x Magnification: These binoculars boast a powerful 28x magnification, allowing for close-up views of your subject. This versatile magnification is ideal for detailed astronomical observations and terrestrial viewing, making them an indispensable optical tool for enthusiasts.
  • 100mm Objective Lens: Equipped with a generous 100mm objective lens, these binoculars excel at gathering ample light, resulting in clear and detailed observations. The larger objective lens diameter enhances light collection, making them well-suited for low-light conditions and celestial object observation.
  • Large and Sturdy Design: Featuring a robust construction with a substantial 100mm objective diameter and a 560mm focal length, these binoculars accommodate a wide range of observations. Their impressive size ensures stability and delivers exceptional image quality, providing an immersive viewing experience.
  • Versatile Observation: With these binoculars, you can explore celestial wonders like the moon, planets, and bright deep-sky objects in the night sky, as well as terrestrial targets during the day. This versatility allows you to seamlessly switch between celestial and terrestrial views without the need for additional equipment.
  • Built to Last: Engineered for durability, these binoculars are sealed and nitrogen-filled to prevent fogging, making them suitable for various weather conditions and outdoor adventures. Their rugged construction ensures they can withstand the challenges of outdoor use and adverse climates.
  • Comfortable 45-Degree View: The 45-degree viewing angle provides ergonomic and comfortable use, reducing fatigue during extended observation sessions. Individual focusing allows for precise adjustments, ensuring a relaxed and effortless experience, whether you're stargazing or observing wildlife.
  • Integrated Carrying Handle: An integrated carrying handle simplifies transportation and offers a secure grip when attaching the binoculars to a tripod. This handle adds a layer of convenience, especially for on-the-go astronomers and nature enthusiasts.
  • Premium Eyepieces: Included are two premium waterproof Explore Scientific 62-degree 20mm Long Eye Relief (LER) eyepieces, offering high-quality optics for your observations. These eyepieces provide a wide field of view and comfortable eye relief, enhancing your overall viewing experience.
  • Interchangeable Eyepieces: The 1.25-inch / 31.7mm eyepiece holder allows for interchangeable eyepieces, granting you flexibility in adjusting magnification and field of view according to your needs. This feature enables you to customize your observations for specific objects or scenarios.
  • Extendable Dew Caps: These binoculars feature extendable dew caps that help reduce condensation on the lenses, ensuring clear views even in changing environmental conditions. These caps prove particularly valuable for preventing moisture buildup in humid or dew-prone locations.
  • Tripod Compatibility: The binoculars are tripod-compatible, featuring two 1/4-inch and one 3/8-inch photo thread connections, which ensure stability for your observations and minimize vibrations. Tripod compatibility is crucial for steady, shake-free views, especially when observing at high magnifications.
  • Included Accessories: This inclusive package provides all the necessary components for a comprehensive and seamless observing experience, featuring practical carrying handles for effortless transport, protective lens caps for safeguarding optics, premium eyepieces for optimal viewing, extendable dew caps to prevent condensation, and a valuable Limited 1-Year Warranty for enduring assurance.


Recommended Accessories:

For an enhanced viewing experience, it's advisable to employ a robust tripod with the suitable weight-bearing capacity.

These binoculars can be securely affixed using either two 1/4-inch or one 3/8-inch threaded holes, which align with the standard tripod connections.

For optimal stability, you may want to explore the optional Explore Scientific U-Mount with Tripod for BT-100 Large Binoculars, specially designed for ES BT Series Binoculars.

Explore Scientific U-Mount with Tripod for BT-70 Large Binoculars

The adjustable friction mechanism of the Explore Scientific U-Mount ensures seamless movements and steady positioning, even when magnifying at higher levels.

This feature enables you to observe intricate details without any disruptive vibrations.


What's Included:

✓ Explore Scientific 28x100mm BT-100 SF Large Binoculars

✓ Carrying handle

✓ Lens caps

✓ 2x Explore Scientific 62 Degree 20mm LER eyepieces

✓ Extendable dew caps

✓ Limited 1 year warranty



Item Number  01-14220
Optical design  Achromatic refractor Porro
Mirror / lens diameter  100 mm
Focal length  550 mm
Focal ratio  5.5
Apparent Facial field  62 degrees
Type of remuneration  Enhanced Multilayer Desposition (EMD)
Exit pupil min.  3.6 mm
Field of view  2.3 degrees
Waterproof  Yes
Water resistance protection level  IPX6
Exit pupil distance  15 mm
Total length  520 mm
Total width  270 mm
Total height  155 mm
Total net weight  6800 g
Housing material  Magnesium



Explore Scientific BT-100 SF Large Binoculars Product Manual:

Customer Reviews

Based on 1 review
Wowza Astronomy Binoculars!

These Bino's are totally awesome. We are all totally amazed at the beautiful clear images they deliver. Very easy to bounce from target to target.