As newbie but already impressed by dt I realized that neither any cameras nor any lenses show up in the lens correction dialogue. That is, if I click on "select manually" (hope that's the correct translation since I am using the German language version) exactly nothing shows up, blank, nothing to select from.
Lensfun's database is in /usr/share/lensfun. It oviously is ver. 1 (camera-wise).
I am on Fedora 30 both darktable 2.6.3 and lensfun 0.3.2 (really, then why is it ver1??) are installed from fedora's repository.
Where I desperately am in need of help is: where does darktable look for lensfun?
I have downloaded the current version 0.3.95 and am about to compile it, but don't know whether to use -DCMAKE_INSTALL_PREFIX=/USR/LOCAL or put it somewhere else. At least /usr/share/lensfun where it resides now does not seem to work with my installation of darktable.
Thank you in advance