Quote:
Originally Posted by mura_gadi
Hello,
When using a Ronchi tester, is the diameter of the returned beam on the Ronchi screen related to the diameter of the illuminated field given in "Newt for the Web"?
Thanks
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There’s no relationship that I can think of. The illuminated field given in newt is mainly determined by the diameter of the diagonal mirror and to a lesser extent if you have a narrow aperture stop in the system (eg. small diameter tube).
Rod.