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Vixen FL55ss Fluorite Refractor


The FL55ss is a high-performance, top-of-the-range fluorite apochromat that produces razor-sharp images of the night sky. Thanks to its compact dimensions and lightweight design, it is the perfect travel companion for demanding astronomers.

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In short:

  • Aperture 55 mm - focal length 303 mm - focal ratio 1:5.5
  • Illumination up to full-frame size sensor with optional correctors - see image six
  • Very fine image on axis
  • 282 mm length and 1.5 kg weight - extremely portabel
  • Quality "Made in Japan"
  • Comes with dovetail Slide Bar M - suitable for GP/EQ-5 style saddle plates
  • High-performance, top-of-the-range fluorite apochromat
  • Compact, lightweight and transportable
  • very high quality standards, fluorite optics
  • Suitable for full-frame photography
  • Razor-sharp star images across the entire field of view
  • Perfect for air travel and excursions

High-performance, top-of-the-range fluorite apochromat for mobile astrophotography and observers.
Thanks to its small size and lightweight design, this high-quality fluorite refractor is ideal for excursions and air travel.
It displays razor sharp and bright stars across the entire field of view of the full-frame image sensor (95% illumination with 44 mm image circle).
The FL55SSS turns into a fast F/4.3 astrograph with the optional flattener and focal reducer. It allows you to use extremely short exposure times and a provides a large field of view for large nebulae or comets.
Despite the small aperture, the FL55SS features a high-resolution HR eyepiece that produces stunningly clear images of the moon and the bright planets.
When used for astrophotography, it delivers razor-sharp images of stars that are guaranteed to impress.


  • Objective lenses: 55 mm fluorite
  • Focal length: 300 mm F5.5
  • Resolution and limiting magnitude: 2.11, 10.5
  • Light-gathering power: 62x
  • Dimensions and weight: 80 x 282 mm; 1.5 kg
  • Adapter and connections: 31.7 mm receptacle, 60 mm thread


  • 55 mm optical tube with fluorite APO
  • Dovetail adapter
  • Extension Tube 60 mm
  • Dew cap
  • Dust covers

 Technical Data

  • Product Family : Refractor telescope
  • Optical design: Apochomatic Refractor
  • Apeture: 55 mm
  • Focal length:     300 mm
  • Aperture ratio: 5.5
  • Angular resolution: 2.11 arc seconds
  • Visual limiting magnitude (approx., mag): 10.5
  • Type of coating: Fully multi-coated
  • Colour of coating: green
  • Material OTA: Aluminium
  • Type of tripod thread: 60 mm
  • Dust protection caps : Dust protection caps for front lens and eyepiece holder
  • weight: 1.5 kg
Product Details

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AsiAir compatible ZWO cable for 2 heating resistors RCA connectors

Vixen FL55ss Fluorite Refractor

The FL55ss is a high-performance, top-of-the-range fluorite apochromat that produces razor-sharp images of the night sky. Thanks to its compact dimensions and lightweight design, it is the perfect travel companion for demanding astronomers.

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