Here's an early look at what the highly anticipated Canon 5D Mark III firmware may have available. At NAB2013, Jeromy Young of Atomos shows the firmware sending a clean signal and new menu options and working with their Atomos Ninja-2 HDMI Recorder, but keep in mind that the final firmware could be much different. When Canon first announced that there will be a firmware upgrade, they stated it would be released in April (this month). Let's hope they can still make that deadline.
Canon 5D Mark III DSLR Video (Body)