1DX Mark III

[DavidEccleston]

Does the metering sensor work in conjunction with the AF sensor? I mean, in terms of helping it obtain focus?

No idea. You'd think they would find a way to leverage any data available, but they don't really discuss how their AF tracking systems work. Even if IR data is not be dense enough to help with focus directly, but it could be used as a guide to help determine which focus points/zones to track with.

Like I said, I'm in "making stuff up" territory. It seems plausible, but I have no idea.

[Jonathan Huyer]

I've been reading the White Paper and found this tidbit, which explains how the metering sensor helps out with auto focus:

The metering sensor teams up with the new, square pixel AF sensor during viewfinder
shooting, assisting the AF system with its subject detection capabilities. The metering
sensor, with its color recognition capabilities and 400,000 pixel resolution, can recognize an
initial subject, and then update the AF system as to its location during Zone AF, Large Zone
AF, and Auto AF Point Selection shooting through the viewfinder.