Had a go at applying small amount of Lucy-Richardson sharpening in GIMP (in G’Mic plug-in) to my previous lunar image – let me know if you think it is an improvement or not…..
[How to find this filter: After installing G’Mic plug-in into GIMP, click on “Filters” in GIMP. GMIC should appear at the bottom of the drop-down list. Click on that.]
Andy