I am just a little bit disapointed by the new Mamiya 28mm, lots of ac and corner softness problem....
I think you will find the same,or similar, corner softness on the H 28, as well
but when files are processed through Flexcolor or Phocus you will have excellent software
correction of CA to the point you won't know it exists.
The other advantage of the H28,if it is of importance to you,is that the H28 has front
threads and can accept a polarizer,and other filters of course
Did you process your P45 files through the most current version of CaptureOne?
I was under the impression that Mamiya lenses had access to CA controls not previously
available to CapOne/Phase users