Sagittarius and M7

[ref]

My second try using DSS, no tracking just a simple tripod and DSLR.
Canon 50D, 50mm f/1.4
ISO 6400 48x8s Light Frames
10x8s Dark Frames
25x1/4s Bias Frames
Post processing in GIMP
Labels using astrometry.net

[Amaranthus]

James, you need to learn how to stretch your images!

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I had to reduce the filesize in order to post so I lowered the resolution, sorry about that.

[Amaranthus]

Sorry, I meant a dynamic stretch of the data range, so that the fainter features come out. This is done in post-processing.

[ref]

Can you point me towards a guide or resource describing how this is achieved? Sounds interesting.