Gerd Neumann 10 mm Ronchi Eyepiece

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This handy new accessory will help you to check the quality of most telescopes.

Although all aberrations of an optic can be seen in a star test it requires steady air and lots of experience. The Ronchi star test works well with medium quality seeing and is easier for the beginner to perform a correct analysis of a telescope after only a short period of learning!

Some gratings from other manufacturers are made of exposed film or laser printouts with gratings that show inferior contrast so are more difficult to analyse! This Ronchi eyepiece is equipped with a vacuum-metalized chrome on glass grating with 10 lines per millimeter. The grating is on the telescope side of the glass and is precisely in the same plane as the outer stop.

The Ronchi Eyepiece is made from black anodized aluminium with a 1.25" barrel and is supplied in a protective housing with a short manual in English.

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