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Ronchi Eyepiece 10L/mm for Visual Testing


  • Used
  • 9964
  • 1 In Stock
In good, used condition.

Info from the web:
This handy new accessory, the Ronchi eyepiece from Gerd Neumann jr. (the manufacturer of the famous high quality Astronomik filters) will help you to confirm the optical quality of nearly any telescope that you'll come across in the future!
The Ronchi test is easier to perform than a star test as it doesn't require the same level of steadiness and viewing conditions of air as the star test.