Canon R3 Users: Are you experiencing (any) focusing issues? I am!

Mike Engles wrote:

In eye mode the pixel cluster varies, the exif shows it . If there are 44,761,088 pixels and there are 5,940 individual focus areas and if ALL the pixels are used, that suggests that each AF area has about 7535 pixels.

Alternatively a R5 36mm wide frame has 8192 pixels, so each pixel must be .0044 mm. Now if you use the 24mm width, and 5464, each pixel is.0043mm.

I imagine that is not so simple

Interesting discussion!
I think the Eye AF Mode is different from using Single Point or a cluster of points for AF. In Eye AF, I think the camera reads the data out of the sensor as an image,  uses AI to find the face, then the eyes, and then it runs AF on the area of the eyes using the DPAF technology

The non-Eye AF modes just use DPAF to detect focus on the closest object that is within the AF selection area, and then, in Servo, it tracks that object keeps focus on it. I don’t know if the tracking uses AI, compared to the simpler tracking methods used in the DSLR’s.

In sum, none of us know exactly how the camera works internally (unless one of us is a Canon designer). My philosophy about this and everything else with the camera is that there is value in understanding how it works, but at the end of the day, actual experience in how the image looks  is far more useful. And that’s true of whether we’re talking about aperture, lens distortion, diffraction, shutter speed, etc, etc.