StellaLyra 20mm 2'' 80 LER / UWA Eyepiece
StellaLyra 20mm 2'' 80 LER / UWA EyepieceStellaLyra 20mm 2'' 80 LER / UWA EyepieceStellaLyra 20mm 2'' 80 LER / UWA EyepieceStellaLyra 20mm 2'' 80 LER / UWA Eyepiece

StellaLyra 20mm 2" 80 LER / UWA Eyepiece

  (2 Reviews)
✓ 2 year warranty


16x in stock shipped 1-2 working days

About this product

Model:  stellalyra_80_ep_20mm
Part Number:  E20W-CU04

StellaLyra 20mm 2" 80º Long Eye-relief, Ultra-Wide Eyepiece

Premium eyepieces manufactured in Taiwan. 

StellaLyra 80º long eye relief / ultra-wide eyepieces are manufactured to a very high standard by Long Perng in Taiwan. 

Fully multicoated, high-index, low-dispersion Lanthanum glass delivers exceptionally clear, sharp, bright views with excellent colour aberration control. 

All focal lengths have an eye lens and field stop larger than 30mm so are very comfortable to use and 20mm eye-relief so you can enjoy the view even whilst wearing eye-glasses. 

A useful M50x0.75 thread is hidden under the eye-guard so a DSLR or other suitable camera can be connected using the optional StellaLyra Photo Adapter.

Available in a range of focal lengths with 1.25" or 2" nosepiece. 

Includes two end caps and a bolt case for storage.


  • 2" 20mm 80º LER / UWA Eyepiece
  • 8 element / 6 group design
  • 80º Field of View
  • 20mm Eye Relief
  • >30mm Eye lens and field stop
  • Fully multi-coated optics
  • Blackened lens edges
  • CNC machined aluminium body with rubber grip & tapered nosepiece
  • Twist-up rubber eye-guard
  • M50x0.75 Thread under the eye-guard for attaching to a camera
  • Threaded for 2" astronomy filters
  • Manufactured by Long Perng in Taiwan

Eyepiece Field of View Simulator


Focal Length 20mm
Nosepiece Size 2" / 50.8mm
Apparent Field of View 80º
Eye Relief 20mm
Optics Fully Multi-Coated, Blackened Lens Edges
Lenses 8 Elements in 6 Groups
Filters Accepts filters with 2" Threads (M48x0.75)
Accessories Two Lens Caps, Bolt Case


Customer reviews

Average Rating (2 Reviews):  
Write a Review and share your opinions!

Rating (max 5):  
A good eyepiece for really wide views
16 May 2023  | 

I got this to use with a Startravel 102mm refractor, which was bought for viewing wide-angle subjects such as nebulae and clusters. It does this job very well. The real field is greater than with any 1.25" 25mm eyepiece, but the larger magnification gives a bit more resolution and a darker sky background; the smaller exit pupil helps ensure that no light is obstructed by the pupil of the eye. I can find little to criticise; sharpness is well-maintained across the field and I haven't seen any tendency to flare or unwanted reflections, despite the wide angle and complex construction. The only fault worth mentioning is that there is some pincushion distortion, but given the angle of view, this isn't very surprising, and I don't think it's a serious problem for visual use, given the good image quality. I also like the screw-up eyecup, which allows for precise setting.

Rating (max 5):  
Up there with the best
21 May 2022  | 

SL 2" 20mm 80 EP.
This is an extremely competent eyepiece, with great eye relief and sharp images right to the edge of field. I can't detect any off-axis aberrations, edge of field brightening or coma. A target is easily followed across the whole FOV and you don't have to peer 'into the corners' to see the edges. It's hard to find any negatives at all.


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