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Thanks Deb yours is the first ive seen of anyone saying they have had the problem.
My 1Dx's have 85k and 95k shots with no sign of any misbehavior.
Good luck so far i guess or maybe Canon is scared of another Mk3 PR disaster.
Imagemaster so i guess your saying that the AF searching but not locking or a blurry image in the viewfinder are not AF issues?
Oh thats right they are engine issues indicative of an internal combustion engine about to seize because of lacking lubrication.
Jeez i should of known..maybe some more SAE 30 for your 1Dx...
There may not have been many complaints because it requires a certain volume of shooting for symptoms to show up. Or perhaps, like me, the camera has been rock solid so they thought it was a lens problem. It took the issue appearing on multiple lenses, and the volume of oof shots to increase, for me to suspect the camera. (My 400 2.8 II had issues with the FW update, so it looked like an extension of that.) In the couple of weeks before the advisory, I was just becoming suspicious of the camera. The viewfinder problem I had initially chalked up to aging eyesight.
This thread also contains comments from another shooter who blamed the lens but had begun to wonder if it was the lens.
Preventative maintenance is the best kind: quick and cheap. Not sure why anyone wouldn't do it and risk missing the moment if their camera's AF starts to slip. Plus, it is essentially a free clean and check. Mine needed mechanical and electrical adjustments, too. No charge from Canon. Will they do the same if someone opts out of the fix now and their camera later requires repair? Maybe. Maybe not.
When the Mark III had issues, there were screams of conspiracy and coverup. This time, there are suspicions that Canon is spending a huge amount of money in shipping and expensive tech time to get people to send in cameras that don't need to be looked at. WTF?!?