Canon R7 + EF 70-200mm 2.8L USM I (focus or configuration problem?)

[andersonnssilva]

Could you tell me if the Canon EF 70-200mm 2.8 L USM (first generation) adapts well to the Canon R7? If there is a setting... I'm having trouble with this combination. I photograph sports (American football) and I notice that I lose focus very easily when I photograph using H+ / AI SERVO / AF SERVO 2 or 4. I notice that even though it appears "in focus", the images are blurry or the subject is not well focused. I've already changed firmware, I've tested several settings and nothing changes. I saw in a publication some lenses that don't work well above 15 fps. I would like feedback. Thanks.

[andersonnssilva]

Thank you for your help.

[deebatman316]

Now I haven't tried old Ring Type USM lenses to see how they perform. All version of the EF 70-200mm have used Ring Type USM.