« on: August 02, 2014, 01:34:29 AM »
Regarding the 1DX (I'd guess it's the same for the 5D3 having the issue too...), send it into Canon for inspection... just got mine back from CPS, shutter assembly had to be replaced.
I had an under-exposure issue on the first frame vs. your darker... shutter was sticking for the first exposure then was fine for subsequent frames. Mine would occur after the camera had "rested" for awhile, as long as I kept using it I had no issue, it was the first burst after not using the camera for a bit. I noticed it happening the first burst of the day, I was shooting a 22 day baseball tournament so I got to see it happen and could recreate it quite easily.
You describe my problem. Many thanks. Canon has to fix this with a replacement of the shutter assembly.
That was the fix they made to mine... Like I mentioned, I hadn't seen the issue on any of my other X's so I knew there was something up... I'd already put double the exposures on each of the other three so I knew when I started seeing it that there was something up with the body... I sent it in with a disc of samples... they were able to replicate it so the shutter assembly was their solution... Might give them a call at least so see what they say....