When shootin portraits i only use single point autofocus and i have no problems, even with my 85 1.2. With my kid running all over the place, i use case 1 and try to keep the focus point on his eyes and everything is fine to. Have you tried to microadjust your lens? This may be the problem...
Hi thanks, yeah, it's been calibrated by Reikan Focal. And I do get most shots in focus, andeven miss by 2 cm the shot is useless.
I have tried googling about inconsistencies in AF with the 200mm f2.0 and 100% of the hits I find is the opposite, NO inconsistency, incredible accuracy etc etc. And I'm very used to the 1dx, and I had MUCH better hitrate with my 70-200 mk2, so I'm starting to think that there might be something off with my lens...
That's an expensive item to be just a paperweight. Don't think twice. Send it in to Canon for evaluation. Or exchange as defective if it's still in the exchange period.
Mkii lenses incorporate closed loop AF which the 5d3 and 1dx utilize. Older lenses do not. I have the same issue and the 70-200 nails AF every time.
For f2 lense you may want to enable only cross type AF points. Default is to use them all. I've had better AF luck that way but typically on fast moving objects such as birds.