Bought a new Mark III on Friday with Firmware 1.3.3 installed from factory. Would like to know if multiple 5D Mark III owners have Firmware version 1.2.3 and 1.3.3 installed. I am wondering if my differences in exposure readings are caused by new 1.3.3.
Difference is 1.3.3 is +1/3 compared to 1.2.3.
Unfortunately, Canon USA has no information regarding the 1.3.3.
They do know that I can not drop back to 1.2.3 in new camera.
If you have two bodies do you see any differences in meter reading, no matter what FW versions you?
Thanks.

