I have a bunch of Canon 10D (CRW format) files where I forget to activate the Owner Name in the Camera Settings. I've downloaded Image-ExifTool and read the instructions but still can't figure out what it is I need to do to write this my name eg. "Leprish" into the Exif Owner Name field. I use Mac OSX and would very grateful for an example of what it is I need to be typing into Terminal. to achieve this. Also, is the process one file at a time or can I run a batch that will apply the the edit to all of the files?