I have started learning astrophotography since a few months and now I have more questions than answers...
What is your opinion: if there are many light frames but they have only about 5 stars at the most (for example vicinity of M51 or NGC5866-Spindle Galaxy) and very few details, how can they be stacked?
I am primarily asking for an advice about software and/or processing parameters as I cannot do much about taking better pictures. (I used to take BMPs but learned quickly that FITS is the only good solution ) I use an Alt-Az mounted Celestron NexStar 8SE with ASI120MC cam, so my field of view and exposure times are limited and cannot eliminate field rotation.
DSS wants to stack only 1 of the frames no matter of the star detection treshold. I found a very promising software AstroArt which has a manual align function (I have to select the same star or detail on all of the light frames) so the frames can be stacked just the stars far from the reference star are 'smeared' along a circle line due to field rotation. I haven't found other solutions yet.
What do you think I should do? Any little advice will be highly appreciated!
PS: I suppose PixInsight can do this as almost everything else too but if there is a more simple solution suited for a beginner like me, I would try that one in the first time