Originally Posted by mas
Of course I knew someone would say that. Meanwhile, I'm still curious.
I am not aware that Mamiya has ever published MTF graphs, and any third-party attempt at producing them are usually fraught with inaccuracy unless you have a Zeiss collimator
It's probably best to imagine an empty
graph, because all the lines are jammed to the top. Really, don't even care about resolution with these lenses - like Rolls-Royce said: "Resolution is sufficient".
Testing shows the 80mm, wide open in the corners to best the centre resolution of any Rollei/Zeiss/Hasselblad 80mm ever made, for example. The wide angles appear to be similarly superior.
Everybody gets different lp/mm when they test these, because they don't have sufficient technique or equipment worthy of testing this lens series.