While new rumors surfaced concerning the firmware updates Canon is going to release soon, there is proof that Canon’s EOS 5D Mark III (price & specs) firmware update is already out in the wild undergoing testing.
The firmware update was seen at the Atomos Ninja booth at NAB 2013 by the guys over at dslrfilnoob:
I was hanging out at the Atomos Ninja booth checking out their new (and beautiful) Samurai Blade when I noticed a 5d mark III on display. I started playing around with the settings and suddenly I had a clean 1080p output. I grabbed one of the Atomos reps and he confirmed that this5d mark III on display was in fact running the yet to be released clean HDMI firmware update.
An Atomos rep said they are testing the firmware since six months.