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Hello All, i am a very beginner in this file, so i hope i am not posting anything already discussed. In these days i made several images of Costellation with my camera Canon EOS750d, 18-135mm. When i process them in Deepskystacker i have several issues i cannot solve: 1. file tiff is estremely heavy for my laptop, and i don't find any other software to crop it or just see it (lightroom too heavy too) 2. colour management: how does that work? Thanks in advance