It took me a long time to finally use the Projects feature in PixInsight but now, I always use this feature when I am ready to do image processing on any Astro imaging project data.
I’m willing to bet that if you’re using dedicated astro image processing software, you’ve at some point run across a capability of the software that does something called image analysis.
Sometimes, regardless of focal length, you just can't fit it all into one frame.Mosaics to the rescue!A mosaic is a composite of multiple frames connected at their edges to create one large image.