Used Oberwerk 100mm BT-100XL-SD Binocular Telescope, Manfrotto Tripod/Head, w/3 pairs of eyepieces, solar filters


  • Sale
  • $2,999.95
  • Regular price $5,180.00


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ECLIPSE ITEMS ARE NOT RETURNABLE Solar Eclipse Glasses, Solar Filters, Solar Telescopes, and other eclipse related accessories and memorabelia are not returnable due to the event based nature of these items.

These are barely used, top-of-the-line, Oberwerk 100mm BT-100XL-SD binocular telescopes in pristine, completely clean, like-new condition.  The previous owner wanted to downsize.  They come on a Manfrotto 3046 tripod with a Nitrotech 612 head.  They include: 

  • Oberwerk 7mm 70° AFOV pair of eyepieces for 80x
  • Oberwerk 14mm 70° AFOV pair of eyepieces for 40x
  • Oberwerk 21mm 70° AFOV pair of eyepieces for 27x
  • Two Seymour Solar 100mm glass filters 
  • William Optics red dot finder

All of the optics are absolutely clean and unmarked.  New, the Oberwerks alone are $3195.  This package would total new:

  • Oberwerk 100mm BT-100XL-SD with 14mm pair = $3195
  • Manfrotto 3046 tripod = $250
  • Nitrotech 612 head = $800  
  • Oberwerk 7mm pair of eyepieces = $320
  • Oberwerk 21mm pair of eyepieces = $320
  • Two Seymour Solar 100mm glass filters = $220
  • William Optics RDF = $75

A total of $5180!  We're selling this package at over 40% off, just $2999.95

At Oberwerk's webpage for these, there is nothing but a solid wall of five-star reviews.  These come in their aluminum-frame case.  Because we do not want to risk these getting damaged in shipping, these are for in-store pickup only. 




The BT-100XL-SD is the pinnacle of Oberwerk optical technology: a 100mm binocular telescope, with apochromatic optics, weighing a mere 12.5 lbs! With 100mm FCD100 objectives, 24mm of clear prism aperture, and a lightweight magnesium alloy body (waterproof and nitrogen-filled), this binocular telescope sets a new standard for image quality AND portability. A binocular of this quality deserves great eyepieces, so we include our finest 70° AFOV 14mm (40x) eyepieces. The SD objectives eliminate chromatic aberration up to 80x magnification (7mm eyepieces). With the widest IPD range of any binocular on the market (50-80mm), even small children can view through both eyepieces.

Other features include a Picatinny rail handle (for mounting a wide variety of finders or laser pointers) and extendable glare shields. Not only is the BT-100XL-SD the highest-quality binocular telescope on the market, with its lustrous “Luna Pearl” White finish and gold-anodized trim, it’s also the most attractive! Our exclusive heavy-duty aluminum-frame case is included. Every BT-100XL-SD is tested and tuned to perfection prior to shipping, with collimation certified to 140x. 



Weight 30 lbs
Dimensions 30 × 16 × 12 in

1.75° (40x)

Exit Pupil

2.5mm (40x)

Eye Relief

15.0mm usable (40x)

Minimum Focus

25 meters

IPD Range


Product Weight

12.5 lbs.