Just a quick and interesting blog post on HDR video and extending HDR options for the Canon 5D MKII
Check GingerHDR and The Merger Software – http://www.gingerhdr.com/
Add new features to your camera
The magic lantern firmware for 5D MkII / 550D –http://www.magiclantern.fm/ will give you the option to shot HDR video and also expand the bracketing options for exposures.Up to 9 frames with spacing from 0.5 to 5 EV can be handled.
To load the firmware you’ll need a card tool. http://wiki.magiclantern.fm/3rd_party_software
Film making on a budget
Build yourself a jibb!