Hi In case you aren't familiar with Canon file naming, the images are saved onto the memory card with directory structure and filename: yyy\IMG_xxxx.jpg (OK this is somewhat simplified as the second two directory digits are specified by the first two digits of the filename counter). The FileNumber tag is accordingly saved as yyy-xxxx. I am trying to restore original filenames of photos using this tag, but don't know how to crop out the first four letters of the FileNumber. At the moment I am using the string (in the 'Target' box of a Windows shortcut) exiftool.exe -filename<IMG_$FileNumber.jpg which results in files named IMG_yyy-xxxx.jpg, as you would expect. How do I stop the yyy- getting into the new filename?