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Group Information

  • Members: 493
  • Category: Telescopes
  • Founded: Nov 29, 2006
  • Language: English
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2 New Members - New Questions

Description

A group dedicated to the Roddier test for evaluating telescope optics.

The "files" area has results for different telescopes and a Cookbook to help you test your own optics.

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80% Encircled Energy Radius
Hi I'm trying to use WinRoddier to measure a lens used for a microscope. I need to find the 80% Encircled Energy Radius. Is there a way to get this number from
Posted - Wed Apr 25, 2012 10:35 pm
 wnderer2
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Re: Newbie: are my results realistic, or not? (Bresser Messier R120,
Hi Marek, ... These images seem more usable. There is much less noise. The PTV is reported at 1/4 wave in green. If correct, its quite good for this level of
Posted - Sat Mar 10, 2012 11:22 pm
 zeissnut
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Re: Newbie: are my results realistic, or not? (Bresser Messier R120,
Hello, ... according to the advices, I took a test of the same telescope using Logitech QCPro 4000 (unfortunately unbeatable Philips PWC2 compression), Sharp
Posted - Sat Mar 10, 2012 8:49 pm
 Marek Peca
hrobotron
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Re: Newbie: are my results realistic, or not? (Bresser Messier R120,
If your refractor is the Fraunhofer design as it likely is, then astigmatism is a sign of severe miscollimation. I would check this first before anything else.
Posted - Fri Mar 9, 2012 7:50 pm
 Tanveer Gani
burdbeen
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Re: Newbie: are my results realistic, or not? (Bresser Messier R120,
Dear John, ... thank you for recommending less defocus for my noisy camera. Also, I can try Sharp LZ-3 CCD (Logitech QuickCam Pro), but there is everpresent
Posted - Fri Mar 9, 2012 8:35 am
 Marek Peca
hrobotron
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Message History

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012 6 1
2011 1 1 21 11 4 1 2
2010 2 20 9 3 5 8 4
2009 11 9 21 8 2 17 1 3 15 18
2008 111 15 25 5 3 19 85 25 3 20 16
2007 77 18 19 54 45 5 7 24 7 3 9
2006 1 15
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