Borg 55FL f/3.6 Astrograph Set A

Borg 55FL f/3.6 Astrograph Set A


Special - Shipped 15-20 working days.

Model:  borg_55fl_f3.6_set
Part Number:  6258
Brand:  Borg



  • 2555 - 55FL Flourite Objective
  • 7761 - M57 Helical Focuser DXII
  • 7604 - M57/60 L 60mm Extension
  • 7880 - 0.8x Quadruplet Reducer
  • 7000 - SLR Camera Mount Adapter

Japanese made Borg 55FL f/3.6 astrograph features a premium quality Flourite objective from Canon.

Includes a Borg Helical focuser for precise dependable focusing. 

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

Can be used visually by adding a 2" eyepiece holder available separately (7508 or 7509).


  • Aperture: 55mm
  • Focal length: 200mm
  • F-ratio: 3.6
  • Lens configuration: 6 elements in 5 groups
  • Coating: Fully multi-coated
  • Physical length: 200mm
  • Tube diameter: 60mm
  • Weight: 0.6kg
  • Filter: 58mm (front hood) & 52mm (7000)
  • Parts included: 2555, 7761, 7604, 7880 & 7000
  • Notes: Camera rotator (7352) is sold separately

55mm Flourite Objective

  • Focal length: 250mm (fluorite)
  • F-ratio f/4.5
  • Length: 95mm
  • Weight: 205g
  • Interface (rear): M57/P0.75
  • Interface (front): 58mm filter thread in front of hood

Precision helical focuser

  • Length: 27 to 44mm light path
  • Weight: 98g
  • OD: 73mm
  • ID: 49mm

0.8x Reducer

  • Four-element reducer
  • Back focus distance: 60mm
  • Objective side interface: M57 P0.75 male
  • Camera side interface: M57 P0.75 female

System Diagram

Items in the red box are optional and available separately.

Telescope Field of View Simulator

There are currently no specifications available for this product.

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