@mcc @hermitcl what level of photo manipulation? Things like what Darktable can do? Or something else?
(Darktable is a *monster*: extremely powerful, but one really needs to know what they're doing. I have only used it to improve some scans of old diapositive (slide film) and it took me forver to do it right because I had no idea what I was doing, but the little I learned by doing finally had me get some excellent results.)