I use a Maxwell Screen, Hi-Lux Brilliant Matte... is has no circle no microprism... no reference to focus...

Please, could you see My gallery (a have only one photo jajajaja) this photo is the example and the problem

Please check if the focusing screen is mounted correctly, if not this is a common symptom.
Could be, but i donīt know how check it, (apparently correct except i cannot distinguish the fresnel side)

If you use wide apertures this technique can cause slight back focus
f/4. 1/60 I read from rollei SL66 users a recomendation to focus tip of the nose...

Thanks a lot