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

SKU 01-14220
Original price $1,999.00 - Original price $1,999.00
Original price
$1,999.00 - $1,999.00
Current price $1,999.00
In stock

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Explore Scientific 28x100mm BT-100 SF Large Binoculars with 62 Degree 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.

                                                                      What's Included:

                                                                      ✓ Explore Scientific 28x100mm BT-100 SF Large Binoculars

                                                                      ✓ Carrying handle

                                                                      ✓ Lens caps

                                                                      ✓ 2 LER eyepieces

                                                                      ✓ Extendable dew caps

                                                                      ✓ Limited 1 year warranty


                                                                      • Enhanced Precision Zoom: These binoculars provide an impressive 28x magnification, enabling meticulous exploration and detailed examination of distant subjects.
                                                                      • Optical Excellence for Clarity: With a substantial 100mm objective lens and 560mm focal length, these binoculars ensure clear imaging and detailed magnification.
                                                                      • Versatility Across Environments: From celestial objects like the moon and planets to terrestrial landscapes, these binoculars excel in a variety of settings.
                                                                      • Built for Rugged Outdoor Use: Engineered to endure challenging outdoor conditions, these binoculars feature fog-proof optics for clear views in adverse weather.
                                                                      • Ergonomic Comfort and Precision Focusing: Enjoy comfortable viewing angles and precise focus adjustments for extended observation sessions.
                                                                      • Convenient Portability with Integrated Handle: The built-in handle enhances ease of transport and provides a secure grip during tripod setup.
                                                                      • Premium Waterproof Eyepieces for All-Weather Viewing: Equipped with high-quality eyepieces that deliver sharp images in any weather condition.
                                                                      • Customizable Viewing with Interchangeable Eyepieces: Tailor your observations by selecting compatible eyepieces to match your preferences.
                                                                      • Anti-Fog Protection and Extendable Dew Caps: Extendable dew caps prevent condensation, ensuring uninterrupted observations even in changing environmental conditions.
                                                                      • Sturdy Tripod Compatibility for Stable Observations: Easily attach them to tripods for stable viewing, essential for high-quality observations.
                                                                      • Comprehensive Convenience: The package includes everything required for a comprehensive observing experience, from carrying handles to eyepieces and dew caps.


                                                                                                      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.



                                                                                                      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 28x100mm 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.