I am accustomed to focussing with an SLR. A rangefinder was an easy transition. A Crown Graphic was an easy transition in principle (haven't shot enough to say I know what I'm doing, but I can see to focus). I have some folders 6x9 and 6x4.5 with that require 'zone focus'. Maybe I'm 'downgrading' too far, if zone focus is technically speaking used in those camera with two or three focus settings ONLY. So let me clarify by saying these have distance scales and I dare not guess (I did on the first roll and won't do that again). I use a separate rangefinder, and can see that at landscape distances and f/11-16 I try to use with those old Tessar or triplet lenses setting shouldn't be too critical. Even with the one that was CLA'ed my results are horrible...compounded by every human error possible. While I'm trying to sort out what caused what (forgetting to bring a tripod, motion blur, etc), I do see nice images posted that are reasonably close up at open apertures, and they DO have the subject in focus. I imagine that wide open & thus with very narrow DOF, on a scale focus camera you're taking chances...separate rangefinders don't seem to have enough distance resolution to get close to pinpointing a narrow DOF. It seems common sense tells me to err more on the side of stopping down because of the obvious variables with such a camera, but the whole experience is taking a lot longer to get used to than I expected.