true, depends on the lens. Zeiss is superb (modern lenses like Milvus or Otus), but vignette is very present and annoying, I want to get rid of it most of the time. For wide-angle, there is still some distortion that need to be removed (sometimes complex mustache-like type, as for Zeiss 15mm). As for the procedure, thanks, I will have a look at it. Just wonder why big companies like Zeiss dont allocate ressource to profile all of their lenses in LensFun. Specialy Zeiss, who suffered from “technical lockdown” from Nikon which refuses to release the official specs of their AF system (closed system) : they should be specially interested in OpenSource standards it seems to me