Spider wrote: fraga wrote:
Can\'t you get and install the former firmware again?
I just got off the phone with Canon and I was told NO. They want me to send the camera in....
Don\'t know why Canon told you not to reinstall the previous firmware unless something has changed drastically between the Mark III and Mark IV (so do it at your own risk).
When they were constantly updating the Mark III firmware I had a similar problem with a firmware update and so I loaded both versions on my SD card and switched back and forth in the field several times and didn\'t have a problem.
The firmware I updated to (and switched back and forth to) was the one where they added a couple custom functions and changed the Joystick application. When I switched back and forth there wasn\'t a problem of any kind. When I reinstalled the old firmware the custom function and Joystick app went away and when I reinstalled the new firmware the custom function and Joystick app came back and worked just fine. I went back and forth many times in the field to test the new firmware and never had a problem.
Since the new firmware overwrites the old the old will overwrite the new. When I go to switch firmware, depending on how many versions you want to keep on the SD card, there is actually a scroll bar that lists all the firmware on the card so you can pick whichever one you want to install or reinstall. I asked a tech at Canon and he thought this worked because during the testing and production stages of building the camera the software engineers probably keep many versions of the FW on the card so they can switch back and forth to test any new changes made to the firmware and algorithms.
It\'s up to you but I didn\'t have a problem and now keep ALL new and previous firmware updates on my computer just in case I have to go backwards. I just load the two versions onto the SD card, at the root level, using a card reader and they show up on the camera screen when you pick the Firmware Update menu function. Be sure to switch to the SD card if that is where you put the FW. I\'m using a Mac but it should be the same on a PC.
Again, this was on the Mark III and worked fine every time I\'ve done it. The Mark IV might have changed but I don\'t know why it would ?? Do so at your own risk though.
Feb 01, 2010 at 01:36 PM
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