@bronger, hi Torsten, are you the “bronger” involved in lensfun please? If so, how do I make my Ubuntu 18.04 and darktable setup get the latest development version of the lens data please, as per the lensfun FAQ.
I don’t know what “version 1” and “version 2” is about. I don’t know if I should be using SUDO with command “lensfun-update-data” (please see above). This all seems rather tricky, Is there an idiot’s guide please?!