Experience the sky — or the world around you — in immersive, high-contrast detail with the Explore Scientific BT-70 Binocular Telescope. Engineered for both astronomical and terrestrial viewing, this powerful binocular system combines superior optics, rugged design, and ergonomic comfort to deliver a truly versatile visual experience.
Featuring dual 70 mm achromatic refractor lenses, the BT-70 provides impressive light-gathering power and a more natural, three-dimensional perspective than single-tube telescopes. Whether you're scanning the Moon’s surface, exploring open star clusters, or spotting distant wildlife from across a valley, this binocular telescope offers clarity, comfort, and control.
It comes equipped with two waterproof 20 mm 62° LER eyepieces, delivering a 20x magnification and wide 62° apparent field of view. Long eye relief and soft rubber eyecups make for easy, eyeglass-friendly viewing.
The BT-70 is housed in a sealed, nitrogen-purged magnesium alloy body rated IPX6 water-resistant. Each eyepiece has its own precision helical focuser with brass compression rings, allowing ultra-fine focus without image tilt. For maximum comfort when viewing objects at or near the zenith, the integrated 45° angled eyepiece design reduces neck strain.
Perfect for the backyard, field, shoreline, or star party — this binocular telescope is a favorite among stargazers, nature lovers, and serious visual observers who demand performance, durability, and flexibility.
CA Residents: Prop 65 WARNING(S)
⭐ Features & Benefits
- Dual 70 mm Achromatic Lenses – Increased light-gathering power and true 3D depth
- Rugged Magnesium Housing – Lightweight, sealed, and nitrogen-purged for fog and water resistance (IPX6 rated)
- Two 20 mm 62° LER Eyepieces Included – Wide 20x magnification with bright, distortion-free views
- 15 mm Eye Relief – Comfortable viewing, even with glasses
- 45° Angled Viewing – Ideal for observing at high elevations without neck strain
- Integrated Dew Shields – Reduces glare and helps prevent lens fogging in damp conditions
- Individual Helical Focusers – Smooth, precise focus control for each eyepiece
- Brass Compression Rings – Secure eyepiece hold with zero tilt
- Standard 1.25″ Eyepiece Compatibility – Customize magnification or add filters
- Mount-Ready Base – Accepts standard 1/4″ or 3/8″ tripod threads
- Top Carry Handle – Makes transport and mounting easy and balanced
🌟 Who It’s For
- Astronomy beginners who want comfort, wide-field views, and intuitive operation
- Nature watchers & wildlife observers seeking stable, high-quality optics
- Backyard astronomers looking for a more immersive, binocular-style observing experience
- Travelers or RVers wanting a dual-use daytime and nighttime instrument
- Experienced observers who prefer wide-field visual observing of open clusters and lunar landscapes
🎯 What You’ll Be Able to See
- The Moon’s craters, highlands, and shadowed ridges in rich detail
- Bright planetary targets like Jupiter’s moons and Saturn’s rings
- Open clusters like the Pleiades or Beehive Cluster
- Bright nebulae such as Orion (M42)
- Terrestrial features like ships, birds, and aircraft from long range
- Mountain ranges, coastal views, and wildlife from observation posts
🎒 What’s Included
- Explore Scientific BT-70 Binocular Telescope
- Two waterproof 20 mm 62° LER eyepieces (1.25″)
- Integrated dew shields
- Precision helical focusers (individual)
- Brass compression ring eyepiece holders
- Carry handle with integrated mounting base
- Protective lens caps & documentation
Tripod and U-Mount sold separately
Specs
| Item Number | 01-14200 |
|---|---|
| Optical Design | Achromatic Refractor Porro |
| Objective Lens Diameter | 70 mm |
| Focal Length | 400 mm |
| Focal Ratio | f/5.7 |
| Eyepieces Included | 2x 20mm 62° LER (1.25" format) |
| Magnification with Included EPs | 20x |
| Field of View | 3.1° (62° Apparent FOV) |
| Exit Pupil | 3.5 mm |
| Eye Relief | 15 mm |
| Interpupillary Distance | 54–76 mm |
| Focusing System | Individual Helical Focusers |
| Eyepiece Holder Size | 1.25" (31.7 mm) |
| Waterproof Rating | Yes / IPX6 |
| Housing Material | Magnesium |
| Dew Shield | Extendable |
| Tripod Connection | 2x 1/4" and 1x 3/8" threads |
| Total Length | 370 mm |
| Total Width | 213 mm |
| Total Height | 122 mm |
| Weight | 3.4 kg (7.5 lbs) |
Warranty
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Free Lifetime Collimation Service – Explore Scientific offers complimentary collimation for the life of the binoculars. Customers are responsible for shipping both ways.
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1-Year Limited Warranty – To activate, simply register your product within 60 days of purchase at explorescientific.com.