dmilligan for his patience answering my noob questions.chris_overseas who did the 5D3.133 port which had the last few missing pieces to get this working.a1ex for his guidance and encouragement and keeping this project alive.To go back to 113 or 123, follow the instructions on the Firmware Update/Downdate? tutorial. Note that this first very early build doesn't have the ML-SETUP.FIR file yet so make sure your camera bootflag is set before doing the firmware update. To make testing easier for users to try it out, I'll be posting builds to my bitbucket repository download area until it gets into the Experiments download page. Provided of course that it passes the ML stress tests and that enough people test and approve the pull request. With the recently added option to support more than one firmware revision per platform in the ML source code this might be a good opportunity to add experimental releases closer to the Canon firmware revision release dates. This update will not replace the 113 and 123 versions-it can live right alongside the previous versions.If you want the most stable ML experience and don't need the new firmware features, stick with 5D3.113.It is also a good project to learn some very basic reverse engineering. In fact doing a minor firmware update is a good project for someone who is able to compile the ML code and is willing to put in some time searching through a ROM disassembly looking for changes. Ok, that last point was just to make a point-you don't need to be an experienced developer to contribute to Magic Lantern. Because it was a challenge and seemed like a worthwhile thing to do.There are 5D3 owners out there that might want to try ML but are unwilling to rollback the firmware installed on their cameras.Canon removes prior firmware revisions from their product support web pages so you need to download from unofficial sources in order to use Magic Lantern.Once you do update Canon says you can't go back (though you can, really).Because Canon tells us to update our cameras to their latest firmware release.Posted a pull request for 5D3.134 firmware support.

Magic lantern canon 5diii