Search found 4 matches

by c.hengel
02 Sep 2022, 14:09
Forum: Image processing and analysis
Topic: Stacking leads to elongated stars in the corners
Replies: 8
Views: 4568

Re: Stacking leads to elongated stars in the corners

Thank you for taking care of the issue, Fabio! I am looking forward to the SP3 then :) As for your suggestion of using a field flattener: That is what I do. The problem is that APS-C sensor size appears to be the absolute limit for the RC 6 - at least for the two scopes I had the chance to try out. ...
by c.hengel
01 Sep 2022, 16:18
Forum: Image processing and analysis
Topic: Stacking leads to elongated stars in the corners
Replies: 8
Views: 4568

Re: Stacking leads to elongated stars in the corners

Thank you, Fabio, I will send the images. Just to illustrate what I am talking about, two images as a reference ( https://1drv.ms/u/s!AnXit8pN4lz1hKppsKouLy5vmErJJA?e=B4vLJZ ). Left is the DSS-result, right AA8. 189 subs of 3 minutes each. Obviously, there is a collimation issue I don't get really s...
by c.hengel
01 Sep 2022, 06:26
Forum: Image processing and analysis
Topic: Stacking leads to elongated stars in the corners
Replies: 8
Views: 4568

Re: Stacking leads to elongated stars in the corners

I did. This is where you can choose the number of stars used for alignment up to a limit of 40.
by c.hengel
31 Aug 2022, 09:58
Forum: Image processing and analysis
Topic: Stacking leads to elongated stars in the corners
Replies: 8
Views: 4568

Stacking leads to elongated stars in the corners

Hi there, my images suffer from elongated stars in the corners. The stacked image looks like the star position had moved between the subs at the edges and corners, while in the center they remain well aligned. When I blink the individual subs I cannot see a displacement as large as the elongation of...