Borg 89ED f/6.7 with Rack & Pinion Focuser OTA Set

Borg 89ED f/6.7 with Rack & Pinion Focuser OTA Set

  (1 Review)
✓ 2 year warranty


Special shipped 15-20 working days.

About this product

Model:  borg_89edII_f6.7_rp_set
Part Number:  6674

Japanese made Borg 89ED f/6.7 refractor with ED glass element, which significantly reduces chromatic aberration. 

Includes a Borg 2" Rack & Pinion focuser with fine focusing knob for smooth, accurate focusing.

Modular Borg design allows you to reconfigure the scope for visual observing or to disassemble it for ultra portability.

Includes a 2" eyepiece holder for visual use.


  • Aperture: 89mm
  • Focal length: 600mm
  • F-ratio: 6.7
  • Lens configuration: 2 elements in 2 groups
  • Coating: Fully multi-coated
  • Physical length: 510mm
  • Tube diameter: 80mm
  • Weight: 2.0kg
  • Filter: 82mm (front cap)
  • Parts included: 2589, 7803, 7051, 7801, 9850 & 7504
  • Notes: BORG rack & pinion focuser. 2-inch opening & M57-thread.

89mm ED Objective

  • Focal length: 600mm
  • F-ratio: 6.7
  • Weight: 860g
  • Length: 150mm

Borg Rack & Pinion Focuser

  • M68.8/P0.75 male at the objective side
  • M57/P0.75 female at the camera side
  • 760g
  • 79-144mm long (65mm focus travel)
  • 2mm stroke per rotation of 30mm diameter fine focus knob

System Diagram

Items within the pink box are optional items available separately.

Telescope Field of View Simulator

What's in the box

  • 2589 - 89ED Objective
  • 7803 - 80mm Dia. 205mm Tube
  • 7051 - 80mm Dia. 50mm Tube
  • 7801 - M77.6 to M68.6 Adapter
  • 9850 - Rack & Pinion Focuser
  • 7504 - 2" Eyepiece Holder SII

Customer reviews

Average Rating (1 Review):  
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Borg89 ED Wonderful lightweight scope
Friday, 27 April 2018  | 

I have had my Borg89 for a few years now and I love the wide crisp views that it gives me. It is very lightweight. However, its biggest benefit to me was that I could easily convert it to use binoviewer by simply changing the 205mm tube for a 150mm tube - got to love "modular" scopes


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