According to a user from Magic Lantern Forum, Canon will soon release a new firmware update for Canon EOS 5D Mark III. The new version is V 1.3.3. Features of new firmware is not available yet.
From ML Forum:
“Few weeks ago I bought a 5D M III. Today I tried to install Magic Latern, but I failed. The firmware version of my camera is 1.3.3, and there was no ML installation file for this version. Then I visited Cannon’s website to download firmware 1.2.3. I tried to install 1.2.3, but my camera said ‘Firmware older than Ver. 1.3.0 is on memory card. Delete old file and update using later version.’. One thing I was surprised about is that there is no firmware 1.3.3 on Cannon’s webpage. It is very strange that my camera is running 1.3.3 firmware.”
| Check Cheapest Price at Stores Below | ||
|---|---|---|
| 5D Mark III Body Only | Amazon | B&H | Adorama | Best Buy | eBay | |
| 5D Mark III w/ 24-105mm lens | Amazon | B&H | Adorama | Best Buy | eBay | |
| 5D Mark III w/ 24-70mm lens | Amazon | B&H | Adorama | Best Buy | eBay | |
| Refurbished 5D Mark III | Canon USA Direct Store | |

Wonder if his new Mk III allows exposure compensation in Auto ISO. I’ve read that the 1Dx’s last firmware upgrade included that feature and I was hoping it would trickle down in the next upgrade. Would be very much appreciated.
This would be amazing. My 5D3 seems to underexpose and this basically limits me from using manual mode unless I want to be bothered with constantly adjusting the ISO to compensate.