>>2585974Well you got 2 options if you want still stars. Shot high iso and then take dark frames and use a software like deepskystacker to get rid of the noise but this will affect the foreground hard and if you have trees forget it.
The easy and fast way is to shoot high ISO and shoot a few frames one after another. The more the better but keep in mind you have to align them. You align once for the stars and once for foreground. Photoshop autoaligns for foreground easy but for stars you must mask everyphoto and then auto align and even then might fail. I manually align them. Then you group them into smart object and you set stack mode to median. This gets rids of the noise but leaves stars intact. Pic related is a single shot of the five I've used. Much more noise.
All I've said is in this video.
https://www.youtube.com/watch?v=Rydg7JGTAbw 