Oberwerk 100mm Binocular Telescope

Item Code : YOS-11428
Condition : New
Availability : Order
Orginal Link

with 25x, Tripod and Case - OBBT-100

Product Feature

This is a modified version of the 25/40x100mm, but with 1.25" non-rotating helical focusers instead of permanently-mounted eyepieces on rotating turrets. A matched pair of 25x (24.43mm) fully multi-coated wide-angle eyepieces are included.. And because the helical focusers are a non-proprietary 1.25" design, your favorite 1.25" eyepieces can be used as well. The eyepieces do not rotate when focusing- a feature found only on high-end helical focusers. The rest of the binocular, including the semi-apochromatic triplet objectives, is the same proven design as found in the original 25/40x100mm. And just like the 25/40x100mm, broadband multi-coatings (non-reflective green/purple) are used throughout, including on the massive porro prisms.


  • Objective size: 100mm (f/l 620mm)
  • Magnification: 25x included, accepts any 1.25" eyepieces
  • Prism: BAK4
  • Optic coating: Fully Multi-coated including all oculars
  • Field of view: 25x- 2.5°; Apparent FOV- 67°
  • Exit pupil diameter: 25x- 4mm
  • Exit pupil distance: 25x- 16mm
  • IPD (inter-pupil distance) range: 58-80mm


Since 1999, Oberwerk has been continually pushing the quality of overseas optics factories to progressively higher levels. While other mass-producing brands emphasize increasing profits by cutting manufacturing costs, Oberwerk demands that their factories produce the highest-possible quality they are capable of, regardless of cost. Product quality assurance is performed at our facility in the Russ Research Center, where each and every binocular is thoroughly tested and fine-tuned. This emphasis on high quality over profit makes OBERWERK® products only slightly more expensive than the lowest-priced competitors, and an incredible bargain compared to the rest of the world's finest and most-expensive brands.

OBERWERK® center-focus binoculars feature "slow" focusers that require more than one turn of the focus wheel to move from one end of the focus range to the other. Other brands utilize "fast" focusers that move from one end to the other in less than 1/2 turn of the focus wheel. Unlike competitor's "fast" focusers, OBERWERK® "slow" focusers have a more precise adjustment, and will not drift from pressure on the oculars.

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