The only official source for the is Canon’s global download servers. As of 2023, Canon has moved many legacy products to "Archived" status, but the file is still available.
Ensure your battery is fully charged . If the camera loses power during the update, it can cause permanent damage.
Ensures better stability when shooting in high-speed burst modes or recording long video clips. Pre-Update Checklist
Format your CompactFlash (CF) card in the camera first. Then, download the firmware file from Canon's site and copy the .fir file to the card's root directory using a computer.