[gentoo-user] Kubuntu - edit file details shown in Dolphin?

[Mark Knecht]

This isn't Gentoo specific but I'm wondering if anyone knows how to edit
values shown in the 'Details' tab of Dolphin, either in KDE or at the
command line?

To keep graphics out of this email feed I'm attaching a link to a
screenshot on Google Drive. Hopefully the permissions allow anyone to view
it.

https://drive.google.com/file/d/1pfbMAMz5Btbyx7tAJ90c2KXDKeMRWBOA/view?usp=sharing

In this case I'm shooting digital pictures on a modern DSLR with a lens
originally built in the 1970's for film cameras. As such it does not report
to the camera it's focal length and fstop which are filled in with default
values by the camera at 50mm and f/0. The lens is actually a 200mm lens
with fstops 4 to 22. I'd like to edit those two values if possible.

Anyone know how to do this?

Thanks,
Mark