Borg 90FL f/4 Astrograph with Feather Touch Focuser Set
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Borg 90FL f/4 Astrograph with Feather Touch Focuser Set

£2,199.00✓ 2 year warranty

:  

Special shipped 15-20 working days.

About this product

Model:  borg_90fl_f4_ftf_set
Part Number:  90FTF4

Japanese made Borg 90FL f/4 astrograph features a premium quality Fluorite objective from Canon with 80mm tube diameter.

Includes a Starlight Instruments Feather Touch 2" dual speed focuser with 2" of draw tube travel and a compression ring.

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

Specification

  • Aperture: 90mm
  • Focal length: 360mm
  • F-ratio: 4
  • Lens configuration: 6 elements in 5 groups
  • Coating: Fully multi-coated
  • Physical length: 400mm
  • Tube diameter: 80mm
  • Weight: 1.9kg
  • Filter: 82mm (front cap) & 48mm in front of reducer
  • Parts included: 2591, 7151, FTF-BORGII, FTF-M57, 7872, 7352 & 2 x 7085
  • Notes: Includes a pair of mounting rings.

90mm Fluorite Objective

  • Focal length : 500mm
  • F-ratio : 5.6
  • Weight : 950g
  • Length : 145mm

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

  • 2591 - 90FL Flourite Objective
  • 7151 - 80mm Dia. 150mm Tube
  • FTF-BORGII - M77.6 FTF Adapter
  • FTF2008B-M57 - 2" Feather Touch Focuser
  • 7872 - 0.72x Quadruplet Reducer
  • 7352 - M57 Rotating Ring DX
  • 2x 7085 - Series 80 Mounting Ring

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