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James Cunningham
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Reged: 08/07/10

Loc: Maryland
Airy disk in collimation new
      #5152944 - 04/02/12 09:54 AM

If I use Polaris as my first star for collimation, what should be the next star to use that is a little dimmer to get the airy disk? I live in the Eastern part of the U.S. Thanks.

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AhBok
professor emeritus


Reged: 12/02/10

Re: Airy disk in collimation new [Re: James Cunningham]
      #5152979 - 04/02/12 10:23 AM

I use Polaris to check collimation (though lately, I've been using an artificial star to set collimation). At 303X Polaris exhibits a nice airy disk with two faint rings surrounding it.

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James Cunningham
Post Laureate
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Reged: 08/07/10

Loc: Maryland
Re: Airy disk in collimation [Re: AhBok]
      #5152987 - 04/02/12 10:29 AM

Then I will just use Polaris. I will get a one star alignment and magnify the image with a 2x barlow. That should get the airy disk. Its already collimated with concentric rings. I have an artificial star but can't seem to get the hang on using it.

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