Quote:
Originally Posted by Startrek
... but the images were showing stars with one end blurred and irregular shaped.... It wasn’t until I posted my problem on IIS that a few members advised to buy a Cheshire and adjust the secondary through the focuser sight tube. I found out it was out of alignment quite a bit even though the laser looked ok... .Once adjusted and aligned I went out on the next clear night to perform some test images on bright and dim stars and they were perfect , tac sharp and nice sharp diffraction spikes. Problem solved !!
So the moral to the story is don’t just rely on your laser collimator , learn how to use a Cheshire and use your laser as a cross check that both secondary and primary are aligned.
Clear Skies
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You stated that when you first used the cheshire, the secondary mirror was way out of alignment even though the laser collimator indicated alignment.
Can you elaborate? I presume the secondary mirror was not centered under the focuser. How far off was it?
Jason