Originally posted by clackers It's surprising to see how close, such as this Canon EOS R, where Eye AF does not work and it's back to Pentax style Face Detection.
First of all, that was the eye af and face detect of the camera when was launched. Here is how eye af looks like after the latest firmware update. Keep also in mind that this isn't a sport camera.
Originally posted by clackers Here's the Sony A9 which has been asked to track Chelsea Northrup's eye. Oops!
Second, when comes to eye af of Sony, Canon and Nikon, even if the little square seems not to keep up with the eye, if you look at the end result, you may be surprised about how well it tracked the eye.
Originally posted by clackers I've shot eye AF with an A7 IIIR
Third, have you used A7R III with the latest firmware update? I'm asking because there is a big difference in Af performance and with the latest Sony firmware update the eye af and overall tracking became really good compared to what Sony or internet reviewers said when the latest Sony cameras were released.
Forth, eye af becomes less important when the subject is far away because the DOF increases and if you shoot a person full body with some negative space around, shooting with eye af or with face detection will give you same results. The advantage of eye af or face detect comes when you want to be sure you get the person face in focus no matter where he moves in the frame. With DSLRs you need to use either single point af either group af area (5 af points group seems also used by Olympic pro photographers) and you need to keep the af point/af points on the subjects face. When comes to sport cameras like Canon 1Dx II or D5, these cameras comes with improved face detection over 5D Mark IV for example and this feature helps photographers keeping the subject in focus in demanding situations. In addition to face priority mode, a subject tracking has been added for situations when a face is not visible (motor sports for example). That's why DSLRs are still going to be used by sport photographers. Not to mention build quality, service and support they get at sport events...
On the other hand, technology improves things year after year and if Canon and Nikon will push mirrorless cameras in sport and wildlife, we may see some changes in the next few years even in this segment.