Greetings. I’ve been using Siril for about a year now and have been enjoying it quite a bit. A request I’d like to make is to add “dark-flats” to the calibration page. I’ve recently started using them on deep sky starfield type images where I don’t have to deal with nebular or other diffuse targets. The dark-flats seem to do a very good job of calibrating those images. Having the option in the calibration panel would be convenient. Thanks for any consideration on this. Cheers.
Using dark-flat in the bias entry will do the job.
However, this is what we think about dark flat
Thank you for the response. The article was an interesting read and I can agree with it’s premise. However, the phrase “most of the time” in the conclusion does leave open the possibility that dark-flats do have some use. This is the situation I find myself in currently. I will re-examine my processing chain in Siril and perhaps find that I’m not utilizing the provided tools as well as I should with the standard calibration files. I have been using the “bias” file selection as you mention for my needs. Cheers.
I’ve been told by someone who knows much more than I do that dark flats are necessary. I was previously working without darks or dark flats under the assumption that my camera does not have an “amp glow” problem. But I haven’t been satisfied with my images, and so I took some darks. I believe these show me why my images haven’t been good. I need darks, and maybe dark flats.
I take it from the article quoted above that you do not think dark flats are necessary. The article is way over my head. In any event, I have taken some dark flats and want to use them. I see in your post that these may be put in the Bias directory. Is this still your opinion as of May, 2025? Are bias frames BETTER than dark flats, or is it just a question of extra effort?
There are two types of calibration files needed, some that calibrate the lights and some that calibrate the flats. We call those darks and biases. You can call them darks and dark flats if you want, the result is the same.
In fact, it wasn’t an opinion when we wrote it (science isn’t an opinion 
). So today, it’s still true, even though I know many people disagree… simply because they don’t get the point (IMO).
In other words, your scientific investigation leads you to conclude that bias frames are better than dark flats. Your article explains why you conclude this but actually, what is the difference?