Focus issues with Canon EF 70-200mm IS USM MkII using two different adapters R6 & R7

[Sharpie1971]

Hi I was wondering if anyone can help with this issue, it's really odd. I've had the EF 70-200mm IS USM MkII for a couple of years. I bought it from a friend, who had barely used it as he mostly uses large primes. The problem I have is the lens is pin sharp on both the R6 and R7 bodies when the shots are orientated landscape. As soon as I orient the camera portrait all of the shots are shocking, it's like the focus isn't working, almost all of the shots are out of focus and look odd. I have used this lens on many other EF mount bodies, 1DX, 1DX MkII, 7D, 7D MkII and never had a single issue with it. It's almost like it's hu nting for focus but it looks fine while your shooting, but the results are hopeless. I've been shooting sports for more than a decade and never had an issue like this before?? HELP!!!

[Tronhard]

Hi and welcome:
Can you please advice if the adapters are Canon ones and, if not, what brand please?

[Sharpie1971]

Hi Trevor, they are both Canon adapters, one is the standard plain adapter, and the other is the drop in filter model. Cheers, Richard.