You’re probably aware of that, but I think this is the ultimate guide to do nightscapes and astrophotography in FOSS.
As a side note, I’ve never used the dark and flat frames steps, and even so could get interesting results, specially considering that my camera is really low profile.
Thanks for the hint. I have seen the article and also tried to do something similar before but could not figure out how to use Siril at that time.
I followed a different approach:
I took more photos at the place with the stacking idea in mind
I used Sequator (free but not open source) to stack 5 images to get more details and get rid of some of the noise. Also, it is able to process the sky and background separately so you can skip the blending part of the workflow using Siril.
If anyone is interested and wants to start from the resulting tif file I can upload it, but it has 140Mb, I do not know if I can attach it directly to the thread.
Really, it isn’t that hard. Besides, if you take those calibration frames (take them once), you’re able to execute sguyader’s script. Provided you have the same folder structure he proposes, the script does all Siril’s work for you. A breeze!
You are welcome. Guess light pollution filter will help. If you are into hiking there is class 2 close to Schladming, Austria. I have class 2 on 200 km and class 1 on 400km. Though going into wasteland at night is not very safe.
Alone I set out on the road
The flinty path is sparkling in the mist
About taking the pictures: You camera for sure has ISO in-variance, find out when the ISO ramp changes for your camera and then shoot with that ISO. I take night pictures as ISO640, it switches to a different pitch at that ISO.