xf 56mm f 1.2 on a T-X4 - focus issues?

GKramer1 wrote:

When I selected a center(ish) focus point and looked at the photos (on the camera, zoomed in) things looked sharp at the focus point.

When I selected a focus point out toward the 1/3 area, and did the same... things were slightly less sharp. And when I moved the focus point closer to the frame edge, even more so.

But I'm not sure it was missing focus vs lens sharpness as you move toward edges of the frame? I'm not the kind that does "brick wall" tests, so don't have other data to compare this to.

I noticed the same thing. The camera focuses better when I select the focus frame at the center.

But I haven’t tried this with different lenses. So I don’t know if this problem is specific of the 56mm. I don’t know exactly how the AF system of the XT3 works, but I guess it just tries to make the subject under the focus frame looks sharp, but for some reason when the focus frame is more close to the borders, the camera or lens tend to fail.

I could always use the focus frame at the center, and then reframe, but if the subject is too close to the camera, when I reframe the distance will also change a bit, and so I will lose the focus, won’t I? But I could try to use the centered frame when I am more far away from the subject, for head to toe shots.

Anyway, I still don’t understand how some people are very happy with the lens and report no AF issues. And some people can’t autofocus properly and are frustrated after spending a lot of money.

Is it because some 56mm have manufacture problems and need to be repaired or replaced?