>>3032600>>3032600>>3032600Whilst that is an excellent camera and I highly recommend it, 60mm and f/4 on 645 won't knock you out with it's shallow depth of field. At all. It's a street/landscape/travel camera, not for portraiture.
For comparison, here's a shot wide open with the 75/3.5 lensed version of that very cam.
With good technique, and post processing, you will still get visible subject separation even at medium distances and middle apertures, but it's nothing to compare to 80/2.8 on 6x6, let alone anything longer or on a bigger format.