Alan1729 wrote:
There is a problem with all auto focus lenses, that is what they focus on, especially where the scene is ambiguous. When it comes down to it, it is the photographers job to determine where the point of focus is and that means using manual focus on those occasions when auto gets it wrong. Back to the old days, I know it is not easy and takes practice. I have a full kit of canon FD lenses I am now able to use since I bought a Sony A7, getting back into real photography again. You can do it.
The problem is not so much with the auto focus as with the photographers who don't know how best to use it. I think spot or single area, and locking focus with a half press is a good option for something like BIF - or perhaps focus tracking.