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Having been recommended to use ML on my camera, I have been reading on this website about requirements.

Apparently it is suggested I have to downgrade to firmware 1.2.3 for ML to work.

As I have 1.3.5 installed I went onto Canons website and found the following Notes:

- Once the EOS 5D Mark III camera is updated to Version 1.3.3 (or later), it cannot be restored to a previous firmware Version (Version 1.0.7 through 1.2.3).

Does this mean I am unable to use Magic Lantern at least for the time being ?

I originally posted this in the nightly build forum, but as no response guess I must have put it in the wrong place.

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Installed the 1st July 2014 nightly build (my first time use of the software) onto a Kingston 16Gb CF card to use in my 5DMk3 camera.

All seemed ok with the installation, and I went out to take some photos. I dont switch the camera on and off in a session just leave it on.

I was finding between photos that I was having to press the shutter button partially for a couple of seconds for the camera to come out of what seemed to be a hibernation.

After appx 20 photos, everything went dead.

I replaced the battery - no change.

So I then put another card in without ML installed - still dead.

I then put the original battery back in and the camera recommenced working (obviously without ML).

The replacement battery I had also tried, worked as well when I used that next.

Somehow the ML installed CF card had become corrupted I later identified.

Anyone else had this problem or any idea what the problem is. This is the first card I have had corrupt in this camera, and in years of using them never before a Kingston one.

It reformatted ok via my PC, then I was able to put it back in the camera and reformat it in there and it now works fine again (still without ML)

I'm not a programmer so am reliant on all of you guys who are for guidance - thank you.

Incidentally, I went to check the Camera firmware status, and only the Canon one is showing now, obviously not ML because I didnt reinstall it, however I see some topics referring to BootFlag needing to be removed - however my camera still seems to be booting up almost instantly - dont know if this is relevant information for you or not

I dont use the camera for video it is for stills only

Not sure if this is the right place to post or not

Installed the 1st July 2014 nightly build (my first time use of the software) onto a Kingston 16Gb CF card to use in my 5DMk3 camera.

All seemed ok with the installation, and I went out to take some photos. I dont switch the camera on and off in a session.

I was finding between photos that I was having to press the shutter button partially for a couple of seconds for the camera to come out of what seemed to be a hibernation.

After appx 20 photos, everything went dead.

I replaced the battery - no change.

So I then put a card in without ML installed - still dead.

I then put the original battery back in and the camera recommenced working (obviously without ML).

The replacement battery I had also tried, worked as well when I used that next.

Somehow the CF card had become corrupted I later identified.

Anyone else had this problem or any idea what the problem is. This is the first card I have had corrupt in this camera, and in years of using them never before a Kingston one.

It reformatted ok via my PC, then I was able to put it back in the camera and reformat it in there and it now works fine again (still without ML)

I'm not a programmer so am reliant on all of you guys who are for guidance - thank you.

Incidentally, I went to check the Camera firmware status, and only the Canon one is showing now, obviously not ML because I didnt reinstall it, however I see some topics referring to BootFlag needing to be removed - however my camera still seems to be booting up almost instantly - dont know if this is relevant information for you or not

thank you

Ah right I understand what you meant now. Thanks

Are there any known glitches does anyone know from downgrading the firmware - any bits of code which don't get deleted or anything that I need to watch out for

will have a look at the link - still need to work out how to downgrade to that version though

I've tried various search routines but cannot find how to downgrade my Mk3 firmware so that I can use Magic Lantern.

Can anyone help me and also point me to a link where I can get the old firmware from

Are there any known problems from downgrading the firmware


thanks in hope

thank you - said it was a silly question didn't I   

Hi All

Please don't shoot me down in flames for what I am sure is a really silly question but I have tried to find / understand the answers to this.

If the Card on which I install ML is full of images and I change to a second card during a photo session, does ML also have to be installed on that card to access it.

Thanks
Andy