Explore Scientific 52 LER Series Eyepieces
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Explore Scientific 52 LER Series Eyepieces

£58.00✓ 2 year warranty


In stock shipped 1-2 working days.
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About this product

Model:  es_52_3mm
Part Number:  0219503

Comfort, Quality, Value. The Explore Scientific 52° Series™

Very nice flat-field eyepieces with an apparent field of view of 52 degrees and a minimum of 15mm eye relief. 

Fully multicoated edge-blackened optics deliver high contrast, maximum light transmission and freedom from ghosting. Resolution and edge-to-edge field correction are both impressive!  

All Explore Scientific 52° eyepieces are Argon purged (the air inside is replaced with Argon, an inert gas) and sealed so the inside will never suffer from condensation. The interior optics will remain clear, bright and dust-free, year after year. 

The nosepiece includes a milled safety undercut (to prevent the eyepiece slipping out of the focuser) and is threaded to accept astronomy filters. 


  • High quality fully multicoated glass elements. 
  • Excellent resolution and field sharpness, even with fast optics. 
  • 52° apparent field of view. 
  • Minimum of 15mm eye relief.
  • Blackened lens edges for enhanced contrast. 
  • Sealed Argon-purged body (waterproof & fog-proof). 
  • Stainless steel barrel with milled safety undercut. 
  • Threaded for astronomy filters. 
  • Patented EMD-coating to maximize contrast.

Eyepiece Field of View Simulator


Model 3mm 4.5mm 6.5mm 10mm 15mm 20mm 25mm 30mm 40mm
Product Code 0219503 0219504 0219506 0219510 0219515 0219520 0219525 0219530 0219540
Apparent Field of View 52º 52º 52º 52º 52º 52º 52º 52º 52º
Eye Relief 15mm 15mm 15.9mm 16.6mm 16.3mm 15mm 16.4mm 19.9mm 27.1mm
Barrel Size 1.25” / 31.7mm 1.25” / 31.7mm 1.25” / 31.7mm 1.25” / 31.7mm 1.25”/ 31.7mm 1.25”/ 31.7mm 1.25”/ 31.7mm 1.25”/ 31.7mm 2” / 50.8mm
Height (From End of Barrel) 97mm 89mm 109mm 89mm 93mm 76mm 74mm 82mm 103mm
Weight 192g 185g 220g 185g 200g 175g 155g 200g 390g

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