The lens is not in the lens correction module. I know this is a lensfun issue as the lens is not in the supported database. Anybody know why a fairly common lens is not supported?
It is not supported either because you haven’t updated your lensfun database or because someone hasn’t done the work to put it there.
You can be the hero you need.
I had checked http://lensfun.sourceforge.net/lenslist/ and the lens ain’t there.
The most up to date list is here: https://lensfun.github.io/lenslist/ but I don’t see it there.
Upon further investigation it appears it is under development, the testing has been done for distortion and TCA but not vignetting.