Kson Short Tube ST80 – 1.25″ Focuser 400mm f/5 Mk II with Vixen Plate

Original price was: $259.95.Current price is: $189.95.

In stock (can be backordered)


Astrodog Exclusive – The MK II 80×400 Refractor

We’ve listened to what you want, and had it manufactured according to our strict specifications.  Enjoy a great quality refractor at an affordable price – while they last!  (Video shows same model, but with rings instead of affixed vixen plate)

Astro Dog Review – Saxon 804 80mm x 400mm refractor vs. Kson Short Tube ST80 – 1.25″ Focuser 400mm f/5 Mk II with Vixen Plate

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NEW Mk II Upgrades

  • Enlarged 1.5″ metal focusing knobs which allow easy focusing – even at f/5!  Grippy thick knurl, which makes it a joy to focus.
  • Most refractors have one or two screws which dig into the eyepieces / cameras.  We’ve upgraded the connector to a three screw compression ring system to securely hold heavier loadouts


  • 80mm Aperture
  • 400mm Focal Length
  • F/5
  • Achromatic, Doublet Refractor Design
  • Fully Coated, Cemented Lens with K9/F4 optical glass (Yes, we even tell you the glass type we used!)
  • Metal Dew Shield
  • Metal Finder Shoe
  • Beautiful, Pearl White Finish
  • Integrated Vixen Bar – Just slide it in!
  • Lightest unit we have ever had – 1150 grams!

This model is suitable for use as a guider, a finderscope, or as a standalone widefield refractor.  It is fully compatible with the Kson Tracker, the KM MiniMount, as well as other mount systems which accept vixen style connections.

How does this unit compare with similar models?

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Additional information

Weight 2 kg
Dimensions 50 × 19 × 14 cm


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