Hello guys! I am relatively new to astrophotography so i still figuring out things. One of those things is flat frames. I’ve been struggling with flat frames and i could never make them work until recently, when through experimentation, i managed to do it. I made sure i have no light leaks in my system as this was an advice i was given at some point.
The general advice everywhere i asked and everywhere i looked was that you should try to expose the flats, for a DSLR, around 2/3 or halfway through the histogram, and, for a dedicated astronomy camera, around 20000-30000 ADU. This never worked for me!! Through trial and error i settled at an ADU around 3500-4000. How can this be? Isn’t this too low? But yet it works! I may be doing something wrong but it works perfectly. And this is consistent with different cameras too! So my question is how could this be? How did everybody come up with those numbers? Does it work like this only for me?
I use deepSkyStacker.
Cant wait to hear your thoughts!
The general advice everywhere i asked and everywhere i looked was that you should try to expose the flats, for a DSLR, around 2/3 or halfway through the histogram, and, for a dedicated astronomy camera, around 20000-30000 ADU. This never worked for me!! Through trial and error i settled at an ADU around 3500-4000. How can this be? Isn’t this too low? But yet it works! I may be doing something wrong but it works perfectly. And this is consistent with different cameras too! So my question is how could this be? How did everybody come up with those numbers? Does it work like this only for me?
I use deepSkyStacker.
Cant wait to hear your thoughts!
