Pentax 645 vs Mamiya M645 1000S: Which Medium Format Film SLR Wins?

The real question isn't which 645 system is sharper — it's which one changes how you shoot. The Pentax pulls you toward a familiar, faster DSLR-like rhythm; the Mamiya slows you down and makes you commit to each frame. If you're crossing over from digital and want to ease into medium format film, that behavioral difference matters more than any lens MTF chart.