Quote:
Originally Posted by duncan
Hi all,
My 12" Bintel Dob shows some stigmatism, but i think it is more the eyepieces than the main optics. When i move my eye across the eyepiece the little flares on some of the brighter stars moves as well or dissappears. Anyway it doesn't bother me much. One day i'll borrow or buy an expensive eyepiece to check. Out of focus stars are nice and round with central donut, but again the donut moves when your eye changes position across the eyepiece to.
Thank God for the internet and easy communication, imagine being totally alone trying to solve all these problems,LOL.
Value for money you can't beat the big Dobs.
Cheers  |
Duncan,
Sounds like coma to me, or an eye issue.
If you had astigmatism in the primary the aberration inside focus and outside focus will move 90 degrees. Focus will normally be an issue.
A step up in quality in regards to eyepiece normally has a significant improvement of the view.