Hi Carlton
Nice image, but yes unfortunately the core is blown out
For such a bright globular cluster can I suggest that 1 hour of integration at same exposure lengths ( say 30 sec ) and ISO is plenty as your image scale is around 1.7 arc sec per pixel
In Startools, do you use Auto develop for your first stretch and final stretch or develop ? Develop tends to bloat your stars and brighten your background whereas with Auto develop you have more control
Martin
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