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

Started Oct 29, 2020 | Discussions thread
Truman Prevatt
Truman Prevatt Forum Pro • Posts: 14,596
Re: xf 56mm f 1.2 on a T-X4 - focus issues?

GKramer1 wrote:

I saw no one had replied to your question, so I thought I would jump in. I have both an X-T4 and the 56 1.2 (non APD) lens. I've never been disappointed in their performance.

But, I looked over some of the links you provided, and then ran some super-simple tests with my lens. ... and there is something odd going on... but not sure its missed focus.

Sorry I don't have photos attached, but I used my sleeping dog as a subject and shot at f/1.2. This was not eye tracking, obviously.

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.

Sounds like filed curvature to me.

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