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Elongated Stars on One Side of Image

astrophotography
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#1 cwine

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Posted 25 September 2020 - 04:54 AM

Hi! I've been struggling to get rid of slightly spiked/elongated stars that appear on the left hand side of my images. The stars have small spikes coming out the bottom left hand side of them.

 

I use an unmodded Canon 600D with a 70-200mm Canon f4 lens (which I have recently cleaned to try and solve this issue). I use the star adventurer to track, but this doesn't look like the type of trail you get with bad alignment.

 

I've attached some images as an example of what I mean - Example 1 is the bottom left of an image of the North American Nebula, and example 2 is the top right of the same image. Any ideas?

Attached Thumbnails

  • NAN 1.3 Elongation Example 1.jpg
  • NAN 1.3 Elongation Example 2.jpg


#2 Tapio

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Posted 25 September 2020 - 05:16 AM

Star images are brutal revealing optical faults.

Are you imaging wide open ?

Could be tilt too but with camera optics and DSLR it's difficult to cure.



#3 cwine

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Posted 25 September 2020 - 05:39 AM

Star images are brutal revealing optical faults.

Are you imaging wide open ?

Could be tilt too but with camera optics and DSLR it's difficult to cure.

Yep im at f4 in all my images. What is tilt?

 

Hmm would be a real shame if I couldn't get rid of it because it can be quite prominent in some pictures




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