In recent months I experienced some tilt in my images which I blame different things on. Finally I'm getting results I'm happy with after adjusting the backfocus as best as I could. There are some differences between corners but honestly I do not care.
However, today I superimposed images of the same object taken in different nights with slightly different angles.
Well, the center of rotation is not where I was expecting it!! It is displaced to the bottom. I made sure the rotator was secured and tight. I feel no wobbling in the draw tube of the focuser, or at least I don't think so. If anyone has an idea of what could be causing this, thank you in advance!
Bottom corners, starts are elongated towards the center.
Upper corners, stars are tangential to the center.
As stated, I'm happy with the current look of my frames, however I feel curious about this.
Edited by Pelayo, 14 September 2021 - 07:40 PM.