BT-100XL-ED Binocular Telescope - Oberwerk

NOTE – The supplied 14mm eyepieces are now all-black, instead of black with red trim. We’ll update pictures soon, but in the meantime, you can look at images from our Tactical Edition binocular telescopes to see the updated eyepieces.

A Perfect Balance of Performance and Portability

The Oberwerk 100XL-ED combines exceptional optical performance with remarkable portability, making it one of the most versatile instruments in the XL Series. With 100mm FK-61 extra-low dispersion (ED) objectives, 24mm clear-aperture prisms, and a lightweight 12.5-lb magnesium-alloy body, this binocular telescope delivers sharp, high-contrast images with beautifully controlled color across the field of view. The result is stunning clarity and detail — from the intricate surface of the Moon to the vast glow of deep-sky nebulae — all in a compact, easy-to-handle design.

Precision Engineering and Proven Durability

Constructed from a magnesium-alloy body that’s both waterproof and nitrogen-filled, the 100XL-ED resists internal fogging and performs flawlessly in any environment. Extendable glare shields protect the objectives and enhance contrast by reducing stray light, while the Picatinny rail handle allows mounting of red-dot finders, laser pointers, or other accessories for quick aiming and alignment. The ultra-wide 50–80mm IPD range ensures a comfortable fit for virtually any observer — even young astronomers — providing a truly natural two-eyed viewing experience.

Finished in lustrous Luna Pearl White with distinctive red-anodized trim, the 100XL-ED combines Oberwerk’s renowned craftsmanship with striking visual appeal.

Complete Observation Kit

Included are our finest 8-element, 14mm (40×) 70° AFOV eyepieces, offering wide, immersive views with excellent edge sharpness. Optional 22mm (25×) and 7mm (80×) eyepiece pairs provide flexible magnification for sweeping deep-sky observation or high-power lunar and planetary viewing. An exclusive heavy-duty aluminum-frame case is included for protection and storage, with an optional weatherproof 100XL Travel Case available for field use.

Hand-Tuned and Certified

Each 100XL-ED is individually tested, collimated, and tuned by hand, with optical alignment certified to 140× (step <8 arcseconds). Backed by a 5-year Limited Warranty, the 100XL-ED embodies Oberwerk’s dedication to precision engineering, enduring quality, and superior performance.

Key Features at a Glance

• 100mm FK-61 extra-low dispersion (ED) objectives for sharp, color-accurate views

• 24mm clear-aperture prisms for bright, high-contrast performance

• Lightweight 12.5-lb magnesium-alloy body for easy handling and transport

• Waterproof and nitrogen-filled for all-weather reliability

• Picatinny top rail handle for finders or laser accessories

• Extendable glare shields to block stray light and protect lenses

• Ultra-wide IPD range (50–80mm) for a perfect fit for any observer

• Included 14mm 8-element eyepieces (40×, 70° AFOV)

• Optional 22mm (25×) and 7mm (80×) eyepieces available

• Hand-collimated to 140× (<8 arcseconds precision)

• Luna Pearl White finish with red anodized trim

• Heavy-duty aluminum-frame case included

• Optional weatherproof travel case available

• 5-year Limited Warranty