Gerd Neumann 10mm Ronchi Eyepiece - 1.25"

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Gerd Neumann 10mm Ronchi Eyepiece - 1.25"
$59.00
Item # GN-10-101-150
3 Questions(s)

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  • This Gerd Neumann 10mm Ronchi Eyepiece consists of a metal body with a 1.25" shaft made of black anodized aluminum.
  • Holds a tiny piece of glass with a grating on it.
  • This Gerd Neumann 10mm Ronchi Eyepiece is equipped with vacuum metalized chrome on glass grating with 10 lines per millimeter. The grating is on the telescope side of the glass and is exactly in the same plane as the outer stop.
Description

Details

Gerd Neumann 10mm Ronchi Eyepiece - 1.25"


This Gerd Neumann 10mm Ronchi Eyepiece accessory will help you to check the quality of nearly any telescope you come across in the future! While it is true that optical aberrations can be determined by the star test, this method requires steady air and an experienced observer. The Ronchi test is far less demanding: It works within medium air and even beginners will be able to do a correct analysis of an instrument after a short period of learning!

The Ronchi eyepiece consists of a metal body with a 1.25" shaft made of black anodized aluminum. It holds a tiny piece of glass with a grating on it. Some gratings from other manufacturers are made of exposed film or laser printouts: Those gratings will show inferior contrast and will be much more difficult to analyze! This Ronchi eyepiece is equipped with vacuum metalized chrome on glass grating with 10 lines per millimeter. The grating is on the telescope side of the glass and is exactly in the same plane as the outer stop. The Ronchi eyepiece is shipped in a protective case with a short manual in English and German.

Gerd Neumann Product Number: 10-101-150

Additional Information

Additional Information

SKU GN-10-101-150
Manufacturer Gerd Neumann
Optical Design Ronchi
Barrel Size 1.25"
Eyepiece Field of View - Apparent Info not provided by manufacturer
Eyepiece Focal Length 10mm
Eyepiece Eye Relief Info not provided by manufacturer
Eyepiece Manufacturer Series Gerd Neumann Ronchi
Special Feature None
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Included Items

Included Items

  • Gerd Neumann 10mm Ronchi Eyepiece - 1.25"
Questions & Answers

Product Questions

For what types of telescopes can your Gerd Neumann 10 mm Ronchi eyepiece be used on? Reflectors? Refractors?, and/or Cassegrain compound scopes? Thanks!
10
Hi,
Do the 10 lines/mm include black and white lines? I ask because I've seen ronchi pieces advertised with a high line count only to find out that they were counting both types of line and it therefore really only had half the amount of lines. So is does this piece have 10 black lines/mm?
Clear Skies
Thx
4
Please, inform how to use the Ronchi eyepiece: under dark sky on a bright star or the telescope optics should be on a testpad? Thank you.
-10
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