moi j'ai d?j? mis la 1.0.4 et :
Please note that the actual firmware
content of versions 1.0.4 and 1.0.5 is the same.
If your EOS 20D already had the version 1.0.4 firmware when you purchased it, there is no problem with leaving it as is. There is also no problem if you choose to update the firmware to version 1.0.5, but the content of the firmware is the same for both versions.