sur le site canon ( lien donné en début du fil), tu as la procédure de chargement dont cette partie. re"mplace les xxx par la version que tu veux mettre en place et tu as 5d000111

Double-click the CF card icon ["Removable disk (E"].
Remove the CF card from the card reader after confirming that the firmware update file has been saved to the card.
*When removing the CF card, be sure to do so as described in the documentation for the computer or the card reader.
Macintosh