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Hi all,
I set up my rig last night. Unfortunately, I genuinely forgot to try rotating the camera. I can try that tonight. But I did remember to try different length exposures:
10 seconds: stars are nice and round. No noticeable coma.
20 seconds: same
30 seconds: same
60 seconds: same
120 seconds: same
3 minutes: eccentricity starts becoming noticeable
5 minutes: eccentricity only gets worse and always toward the top-left corner as in the image attached at the start of this post.
Overall, I noticed that my stars are drifting toward the top-left corner throughout the night. I guess this explains why the eccentricity is worse for longer subs.
Tonight I will rotate the camera to see how this affects things. In the mean time, any diagnostics and tips? (other than the obvious of taking 2-minute subs from now on) Before imaging, I centred the guidescope image with the main camera image.
Thank you for your help.
Regards,
Stéphane
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