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Is my telescope out of collimation?

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#1 Carl107

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Posted 17 October 2020 - 11:26 AM

Hi,

I use a SW evostar 72ED refractor. When i strech my images, i observe the diffraction on big stars is not centered on the star. Do you think my OTA is out of collimation?

Thanks for the help!

 

P.S. attached  streched image, The rig

Attached Thumbnails

  • veil collimation check.jpg

Edited by Carl107, 17 October 2020 - 11:27 AM.


#2 Tapio

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Posted 17 October 2020 - 11:34 AM

Looks normal.

That could be just reflection from flattener/reducer or from filter.

Nice image.



#3 randcpoll

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Posted 17 October 2020 - 11:37 AM

Probably not. The diffraction is centered on the stars only at the center of the field of view. That's why you constantly have to adjust the star you are using to the center when you are doing collimation. 



#4 Carl107

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Posted 17 October 2020 - 05:06 PM

Thanks guys.




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