Explore Scientific

BT 120mm ED Giant Binocular

Sale price $4,162.00 USD Regular price $5,549.99 USD
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BT 120mm ED Giant Binocular
$4,162.00 USD
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BT 120mm ED Giant Binocular


Description

The Explore Scientific BT 120mm ED Giant Binocular is built for serious astronomers who want the most immersive, two-eyed observing experience possible. Massive 120mm objective lenses paired with premium Extra-Low Dispersion (ED) glass deliver breathtaking views of the night sky - bright, sharp, and rich with detail. The large aperture gathers an abundance of light, pulling out faint stars, intricate nebulae, sweeping star fields, and distant galaxies that smaller optics simply can't match.

ED glass technology aggressively reduces chromatic aberration and false color, resulting in cleaner edges, superior contrast, and natural color reproduction - even at higher magnifications. The BT 120mm comes ready to use with a pair of 62° 20mm Waterproof Eyepieces and accepts standard 1.25-inch interchangeable eyepieces, so you can tailor the magnification and field of view for any target - from wide-field Milky Way sweeps to detailed lunar and planetary sessions.


Key Features

  • 120mm ED Objective Lenses: Massive 120mm aperture lenses with Extra-Low Dispersion glass deliver exceptional light-gathering power with high contrast and outstanding color correction.
  • Reduced Chromatic Aberration: Premium ED glass significantly minimizes false color and chromatic aberration around bright objects, producing cleaner, crisper images.
  • Immersive Two-Eyed Observing: Giant binocular design provides a natural, relaxed viewing experience that makes long observing sessions more comfortable and engaging than single-eye telescopes.
  • Interchangeable 1.25-Inch Eyepiece System: Accepts standard 1.25-inch eyepieces, allowing flexible magnification choices for deep-sky, lunar, planetary, and terrestrial targets.
  • Included 62° 20mm Waterproof Eyepieces: Ships with a matched pair of Explore Scientific 62° 20mm Waterproof Eyepieces for a wide, comfortable field of view right out of the box.
  • Built for Mounted Use: Designed for use with a heavy-duty mount - pairs optimally with the Explore Scientific U-Mount and Tripod for smooth, stable movement during extended sessions.
  • Astronomical and Terrestrial Use: Performs brilliantly on star clusters, nebulae, galaxies, and open clusters, as well as daytime terrestrial subjects.
  • Limited Warranty: Backed by the Explore Scientific limited warranty for peace of mind on your investment.
  • Brand: Explore Scientific - a trusted name in premium optical instruments for amateur and serious astronomers.

What's Included

  • Explore Scientific BT 120mm ED Giant Binocular
  • Pair of Explore Scientific 62° 20mm Waterproof Eyepieces

Why You'll Love It

The BT 120mm ED Giant Binocular is a showpiece instrument that transforms every observing session into an unforgettable experience. The combination of 120mm aperture and ED glass optics means you're getting professional-grade optical performance in a binocular format - revealing detail and depth that will genuinely surprise even experienced observers. Two-eyed viewing is more immersive, more comfortable, and more natural than squinting through a single eyepiece, making it ideal for extended star parties or quiet nights in the backyard.

Explore Scientific has built a well-earned reputation among astronomers worldwide for optical quality and engineering precision, and the BT 120mm reflects that commitment at every level. Whether you're a dedicated deep-sky observer, a lunar enthusiast, or someone who wants the finest binocular views the hobby has to offer, this instrument is engineered to deliver years of rewarding, dependable use. It's an investment in the night sky that will pay off every clear night for years to come.


Product Specifications

View Product Specs
Brand Explore Scientific
Objective Lens Diameter 120mm
Glass Type Extra-Low Dispersion (ED)
Included Eyepieces Pair of Explore Scientific 62° 20mm Waterproof Eyepieces
Eyepiece Compatibility Standard 1.25-inch interchangeable eyepieces
Intended Use Astronomical and terrestrial observing
Mount Requirement Requires heavy-duty mount (Explore Scientific U-Mount and Tripod recommended, sold separately)
SKU 01-14250
Warranty Explore Scientific Limited Warranty (register within 60 days)

FAQ

Is the tripod and U-Mount included with the BT 120mm ED?

No, the Explore Scientific U-Mount and Tripod shown in product images are not included with the binocular. Due to the size and weight of the BT 120mm ED, a heavy-duty mount is essential for stable, comfortable observing. We strongly recommend pairing this binocular with the Explore Scientific U-Mount and Tripod, which are available separately.

Can I use my own eyepieces with the BT 120mm ED?

Yes! The BT 120mm ED accepts standard 1.25-inch interchangeable eyepieces, so you can swap in your preferred eyepieces to adjust magnification and field of view. It comes ready to observe with a matched pair of Explore Scientific 62° 20mm Waterproof Eyepieces, but the flexibility to upgrade or change eyepieces is a key advantage of this system.

Can the BT 120mm ED be used for daytime terrestrial viewing?

Yes, while the BT 120mm ED is primarily designed for astronomical use, its large aperture and ED glass optics also make it an outstanding instrument for terrestrial observing - wildlife, landscapes, and distant scenery all benefit from its light-gathering power and sharp, color-accurate views.

What is the advantage of ED glass in a giant binocular?

Extra-Low Dispersion (ED) glass greatly reduces chromatic aberration - the color fringing that can appear around bright, high-contrast objects like stars or the lunar limb. The result is noticeably sharper, cleaner images with more accurate color reproduction and better contrast, especially at higher magnifications. For serious astronomical observing, ED glass is a significant upgrade over standard optical glass.

What kind of objects can I observe with the BT 120mm ED?

The 120mm aperture and ED optics make this binocular exceptional for a wide range of astronomical targets - star clusters, nebulae, galaxies, open clusters, the Moon, and rich Milky Way star fields all benefit from the light-gathering power and optical quality of this instrument. Its two-eyed viewing format makes sweeping large areas of sky particularly immersive and enjoyable.

What warranty coverage does the BT 120mm ED come with?

The BT 120mm ED is backed by the Explore Scientific limited warranty. To activate full warranty coverage, you must register your product within 60 days of purchase. For full details on what is covered, please refer to the Explore Scientific Warranty Policy.

Product specifications table
Specification name Specification Value
Color pattern White
Material Metal, Glass

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