
If nothing works try lowering the resolution a little. If you’re dropping frames either your card is too slow or you need to turnsome options OFF in the RAW menu.

You will see the camera capturing (or dropping) frames….To record go about as usual, press the “start/stop” button.(should work up to 30p with the proper CF card!) Set your desired framerate in the Canon menu. Exit the menu by pressing the “trash button” again.Leave the other options as they are for now. Set your width and height to be “1920×1080” for HD recording.Now press the “Q” button to access the RAW menu.Select the “RAW video” tab and press SET button on your camera.Go to the trash menu again and go to the menu with the “video camera” symbol.Restart the camera (leave some seconds off).

Also activate thefile_man and mlv_play modules.

Go to the Modules menu with the “squares” symbol (on the far right).Now press the “trash button” on the camera to activate Magic Lantern.Immediately you will see different overlays than usual and the camera will probably instantly go into live-view. Now place that fast CF card you bought (see above) into the camera.Now follow the instruction and “turn your camera off and then on again”. The camera now installs, wait until the green “please restart your camera” text appears.Do the update which will make your cameraMagic Lantern “ready”. Place the SD card in your camera, switch it on and go to the firmware update (yellow tab) in the camera menu.This can be a slow card, it only holds the firmware and it always has to stay inside the camera. Copy the whole contents of the downloaded folderto the root folder on your SD (!!!) card.(latest, stable release we tested from April28th 2015) Make sure your camera is on firmware 1.2.3 ( in your camera go to menu –> yellow tab –> firmware ver.: …), otherwise updateto 1.2.3 by downloading it HERE.Make sure your 5D mark IIIhas a fully charged battery.

(You get 25 minutes of 1080p on a 128GB card) Komputerbay replaces the card, but exchange seems rather slow.
