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    • × Celestron Ultima Edge 24mm Eyepiece – 1.25″ For CheapCelestron Ultima Edge 24mm Eyepiece – 1.25″ For Cheap 2 × $87.00
    • × Astrozap Standard Dew Shield Cap – Meade 16″ For SaleAstrozap Standard Dew Shield Cap – Meade 16″ For Sale 1 × $92.00
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    • × Spectrum 2.5″ Full Aperture Solar Film Binocular Filter Pair – 48mm to 54mm For DiscountSpectrum 2.5″ Full Aperture Solar Film Binocular Filter Pair – 48mm to 54mm For Discount 1 × $79.20
    • × FLI Kepler Gsense4040 CMT Front Illuminated Grade 2 – 65mm FashionFLI Kepler Gsense4040 CMT Front Illuminated Grade 2 – 65mm Fashion 1 × $98.00

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Home / Field Tested Systems

Gerd Neumann 10 L/mm Ronchi Eyepiece – 1.25″ on Sale

$59.00 Original price was: $59.00.$47.20Current price is: $47.20.

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Gerd Neumann 10 L/mm Ronchi Eyepiece – 1.25″

The 10 mm Ronchi Eyepiece – 1.25″ by Gerd Neumann Jr:

 

This Gerd Neumann Jr. 10 mm 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.

OPT Product Number: GN-10-101-150

 

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