« on: April 19, 2014, 07:25:09 PM »
That's very similar to my experience the 5DII, although the hit rate dropped noticeably when the subject was moving toward/away from the camera, or when trying to track moving subjects in lower light. For example, kids coming down a slide at an indoor 'bouncy house' (4-6 EV lighting), the 6D I had borrowed locked on initially at the top, but couldn't keep up with tracking. My 1D X tracks the whole way down, either following the kid with the center point, or using auto point selection and letting the system hand off focus from one AF point to the next.
Yeah, the 6D doesn't handle subjects moving towards or away well at all, especially towards, probably more noticeable due to the shallower DOF. Side to side is OK.
I'll have to rent a 1Dx sometime to see what it can do.