I recently bought a Canon Powershot G7X Mark II. I am using Linux and I found darktable to be a decent photo editor. However, my RAW pictures come with a distortion which darkens the corners and displays my photos as if I had some vignette on them.
I looked at the lensfun camera list and the Mark II model is not supported yet.
Then I learned about Canon's DPP, which does have lens correction included. It does it automatically, it is already done by the time I open the photos in the DPP.
Besides the DPP only being available in Windows, I can't figure out the way to apply the lens correction on the RAW files and store them somewhere accessible from Linux.
I have saved a few of these files in TIFF format, so I could see if they're as editable as a RAW. However, when I compare the edited files in darktable (RAW vs TIFF), they're clearly different.