Gratifying that the Mitty/Minolta match-up confirms the outcome of my test of the same (conducted while trying the Linoscan 115/5.2 scanner lens as a tube lens). The 5400 shows some diffraction blur at 3x (onto 4.5 micron pixels). I only take it up to 2.5x normally, but nice to know the limits - and nice to know I'm squeezing max performance from it. Having said that, the 5400 covers FF way better than the Mitty. Swings and roundabouts.