Borg 55FL f/3.6 Astrograph Set with Helical Focuser
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Borg 55FL f/3.6 Astrograph Set with Helical Focuser

£1,289.00✓ 2 year warranty

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Special shipped 15-20 working days.

About this product

Model:  borg_55fl_f3.6_set_b
Part Number:  62581

Japanese made Borg 55FL f/3.6 astrograph features a premium quality Fluorite 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.

Specification

  • Aperture: 55mm
  • Focal length: 200mm
  • F-ratio: 3.6
  • Lens configuration: 6 elements in 5 groups, 1 fluorite
  • Coating: Fully multi-coated
  • Image Circle: 43mm
  • Physical length: 190mm
  • Tube diameter: 60mm
  • Weight: 0.8kg
  • Filter: 58mm (front hood) & 52mm on optional part (7000).
  • Parts included: 2555, 7761, 7603, 7352, 7880, 7065 & 8992
  • Notes: Includes Camera rotator (7352) and mounting bracket (8992).

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

What's in the box

  • 2555 - 55FL Flourite Objective
  • 7761 - M57 Helical Focuser DXII
  • 7603 - M57/60 M 40mm Extension
  • 7352 - M57 Rotating Ring DX
  • 7880 - 0.8x Quadruplet Reducer
  • 7065 - Series 60 Mounting Ring
  • 8992 - Arca Swiss Mounting Block

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