Airy disk in collimation
2 replies to this topic
Posted 02 April 2012 - 08:54 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.
Posted 02 April 2012 - 09:23 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.
Posted 02 April 2012 - 09:29 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.