A7R4 200/600
This came about as it was mentioned in another forum
I did some tests today as I had not really seen this as much of a problem the a7r4 and 200/600 has given me some nice shots but I tend to go through them quickly and delete most just keeping what I think are the nice ones so often many never got a close look .
Far more had missed focus than I had realized I won't be using this combo again I shot wide open and at 1/4000 and above shutter speed .
I then put the A9mkII on the lens yes I did miss a few but focus was far more precise and a much greater hit rate and was as good as I could wish for.
Next I put the FE 600 on the a7r4 it's not up to the a9mkII in accuracy or speed in grabbing the subject but not to bad over all I need to test this a bit more as it's no good having MPs if there not as sharp as they could be, the a9mkII and FE 600 just blows me away I might just by another a9 MKII and put a 1.4 on the lens as this make very little difference .
I used Zone + tracking and tracking expand Large on both cameras for my testing most shots in clear blue sky so nothing to take the focus of the birds .
Just my thoughts on this.
Rob.