Borg 71FL f/4 Astrograph OTA Set

Borg 71FL f/4 Astrograph OTA Set

£1,339.00✓ 2 year warranty

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About this product

Model:  borg_71fl_80mm_f4_set
Part Number:  6671

Japanese made Borg 71FL f/4 astrograph features a premium quality Fluorite objective from Canon with 80mm tube diameter.

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: 71mm
  • Focal length: 280mm
  • F-ratio: 4
  • Lens configuration: 6 elements in 5 groups
  • Coating: Fully multi-coated
  • Physical length: 330mm
  • Tube diameter: 80mm
  • Weight: 1.2kg
  • Filter: 72mm (front cap) & 48mm in front of reducer
  • Parts included: 2572, 7151, 7801, 7835, 7872 & 7352

71mm Flourite Objective

  • Focal length: 400mm
  • F-ratio: 5.6
  • Weight: 410g
  • Length: 170mm

Precision helical focuser

  • Light path: 63mm to 82mm
  • OD: 77mm
  • ID: 56mm
  • Weight: 320g

0.72x Reducer

  • Four-element reducer
  • Back focus distance: 60mm
  • Image coverage: Full frame
  • Objective side interface: M57 male
  • Camera side interface: M57 female

Telescope Field of View Simulator

What's in the box

  • 2572 - 71FL Flourite Objective
  • 7151 - 80mm Dia. 150mm Tube
  • 7801 - M77.6 to M68.6 Adapter
  • 7835 - Helical Focuser M
  • 7872 - 0.72x Quadruplet Reducer
  • 7352 - M57 Rotating Ring DX

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