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Borg 55FL F3.6 Astrograph with Rack & Pinion Focuser


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  • Choose your accent color: Sunrise Blue or Sunset Orange
  • Telescope Aperture: 55 mm
  • Telescope Focal Ratio: f/3.6
  • Telescope Focal Length: 200mm
  • 43 mm corrected image circle

Product Details

  • The BORG 55 mm f/3.6 Astrograph is a very unique portable telescope. Boasting a small size for easy transportation (including airline and overseas expeditions), this astrograph is the perfect telescope for those needing a portable, high-quality optical tube.

    • 55 mm aperture
    • 6-element advanced optical system, including one fluorite
    • Japanese-made high quality carbon fiber tube
    • Borg Rack and Pinion Focuser
    • M57 camera rotator included
    • Back focus : 60mm from M57 camera rotator thread
  • specifications

    Aperture55 mm (2.25")
    Back Focus60mm
    Corrected Image Circle43mm
    Dawes Limit2.11 arcseconds
    Focal Length200 mm
    Focal Ratiof/3.64
    Highest Magnification110x
    Light Gathering Power62x
    Limiting Magnitude12.5
    Optical DesignPetzval
    Tube Diameter80mm
    Tube Length210mm
    Tube Weight2.7 lbs
  • included items

    • BORG 55FL F3.6ED Astrograph Optical Tube
    • M57 camera rotator
    • Hutech M57 Rack and Pinion Focuser

Product Reviews

Customer Reviews
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Filter Reviews:
    Kevin D.
    United States United States

    A great little scope

    I am using the 55FL with a QSI CCD camera and am thrilled with the results. It is very well built, easy to focus and yields wonderfully detailed images owing in part to the fast focal ratio of f/3.6. It holds focus throughout imaging sessions that often span 6 hours or more. I am very pleased that I purchased this little gem and look forward to many years of imaging with it. Highly recommended!