Canon 5D IV Firmware defective???

[theleprechaun]

Since upgrading the firmware on five of my 5D IV bodies it's impossible to get a crisp tack focus image. It doesn't matter if it's on autofocus or manual.
Best I can get is around 80%. It's worse on my 70-200mm lenses than 50mm.
Anything far away is completely unusable now....
Has anyone else experienced this? I feel like it's semi blurry just looking through the viewfinder.
I didn't experience any of this prior to upgrading.
Has anyone else upgraded to the last couple of firmware's and had focus issues?

 

[Del Paso]

I've downloaded every available firmware to my 5D IV and haven't experienced a single issue...
Focus (AF & manual) is perfect as usual, no matter which lens I use.

 

[Hector1970]

I assume you didn't adjust the diopter.
I've very bad for doing any Firmware updates - if its not broke etc.
It would seem strange the software would have any impact on manual focus.
Have you tried autofocus manual adjustment?