KSON 2″ (2 Inch) 18mm Fully Multi-Coated Kellner Eyepiece 46 degree FOV


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The Astro Dog STAR SWEEPER Experience!

Ultra High Transmission 2″ Kellner 32mm, Low Magnification Eyepiece

We are the only supplier for these high transmission, sweeping eyepieces!   They are particularly well suited to star clusters, nebulas, and planetary work and the moon.

These Kellner’s are sharp!  The quality of view rivals some Ortho’s.  It’s a simple design which allows a lot of light to be transmitted through the eyepiece.  Add modern optical coatings, and you have a superb, lightweight, high transmission eyepiece.


  • Metal CNC machined – Light weight – 193 grams
  • 46 degree FOV
  • 15mm Eye Relief
  • M48x0.75 threads for filter
  • Superb full broadband optical multi-coating
  • Lenses have 2 groups, 3 pieces


  • Very High Transmission – Simple elements mean superb light transmission, brighter images
  • Particularly suited for lunar and deep space images
  • Lovely, sharp views
  • Fully Multi-coated
  • Blackened Interior
  • Soft Rubber Eyecap for pleasant viewing comfort
Customer Review 3/8/2020 : “Stuck the 2” 32mm Kellner in in my 2″ diagonal and it was an utter joy to look at the moon. Jupiter and Saturn were clear with the 32mm too (I mean with my 1900mm f/l, I was still at just shy of 60x magnification, not low power at all!). I have read plenty of things online disparaging Kellner’s when compared to Plossls, but the amount of definition I got through that Kellner was unbelievable (particularly on the lunar surface). Guess that what I’ve been reading about online has been sub-par cheaply made Kellner’s. I actually preferred how these three objects looked through the Kellner rather than the three Plossls (32, 26 and 21mms). Wondering what the AFOV on that 2” Kellner you sold me actually is. I think this might actually be my general viewing eyepiece from here on in…  I actually found it more comfortable to look through than the Plossl’s. It was much easier to line up my eyes with the image that was coming through the eyepiece than on an equivalent 1.25” eyepiece. The views through it were amazing (like you described it below, like a star port).

We have NEVER had these come back – give it a try!

Weight.25 kg
Dimensions9 × 7 × 7 cm