Jump to content


Photo

Astigmatism?

collimation; astigmatism

  • Please log in to reply
No replies to this topic

#1 ChristerS

ChristerS

    Member

  • Beta Tester
  • 87 posts
  • LocationFROSON, SWEDEN

Posted 04 September 2015 - 02:19 PM

Hi,

I have an elongated star effect with my ASA 12N and the Wynne 0.95  I have made some test, by moving focus inside-outside good focus, and start to suspect there could be astigmatism in the system (out of focus elongated stars with 90 degree difference). Have anyone else notices this behavior?

 

I will switch to the 0.73 reducer, when weather allows, and see how it behaves.

 

All images 2 sec exposure Atik 490EX good collimation according to Glatter laser and tublug

 

 

Regards,

 

 
astigmatism.jpg

 

 

 

 

 

 

 

 

 

 

Attached Files


Cheers,
//Christer

www.astropix.se





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users