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Why not just take shorter exposures and then just combine (Stack) them.
You then get the image you want. Plus stars tend to be much smaller and rounder.
Heres an image i took recently while trying to image very faint and small galaxies.
Its a small group of 5 galaxies with the barred spiral being 2.9 arc minutes and 14th Mag.
Since i wanted detail without bloating or saturation, i shortened exposures to 20 and 30 seconds each (I used a 22" f4.5 Newtonian and a SXV-H9) with a total combined 8 minutes.
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