Because I was not completely satisfied with my first version of M13 (see
https://www.astrobin.com/h45ry3/0/ ), this time I processed the same raw material completely differently by using PixInsight for my first time. As was to be expected from the descriptions of many colleagues from our community, the learning curve was very steep but also fascinating. I am very impressed with what is possible with PixInsight. Once you understand the basic philosophy of the software, the fun and the work begins ... :-)
However, this does not fundamentally change the fact that you cannot create a work of art from poor raw material.
Nevertheless as a PixInsight greenhorn, I was able to get a lot more out of the same raw material. But what does not seem to be possible with Pixinsight is to remove a very strong gradient that comes from external influences. In my case, these were apparently reflections from my off-axis guider who was too deep in the light path. (see my second image version). I finally had to remove this gradient with lightroom. I would be very happy to receive appropriate hints.
Without a full moon and more experience, you can certainly achieve an even better end result.
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