Hold your horses. These are not closed systems. They are Leaf/Mamiya mount backs with a Mamiya body. You can use any back on the Mamiya body that you desire.
Looks like the DM22 and DM28 use the AFDIII body, and the DM33 and DM56 come with the new DF body. http://www.mamiya.com/dm56-and-dm33.html
What closes all of these systems, is the specified camera mount and the software.
Even "open" systems like Phase can't seem to decide how "open" they want to be. Buy a phase back with a Mamiya mount and it only mounts on Mamiya cameras, expect for some technical cameras.
It doesn't mount on a Hasselblad, A contax, a Bronica, a Fuji unless you spend a bunch of bucks getting the mount changed and then you can't switch back without spend a bunch of bucks again, or buying some chinese adapter with various cables.
Same with software, can't run a Hasselblad file in C-1, can't even process a Leaf file in C-1 unless you spend the $2,000 upgrade and then it doesn't tether, yet, with availability tbd which is strange because you can tether a Canon camera to Phase software and Phase owns Leaf, but not canon.
Go figure that one out.
There may be a slightly different look between an Aptus to a Phase a Dalsa to a Kodak sensor, but not that much, not when you go to post work and honestly the tests I've done and seen from others, especailly retouchers in final nobody knows the difference.
It's not like the film days with AGFA in a Fuji 600 series looked a lot different than Kodak NC100 in a Hasselblad.
I find all of this restrictive and confusing, and the only way to understand what you are actually buying is to study and read the very fine print. What is a Mamiya 22, vs. a Mamiya ZD2, Vs a Mamiya ZD. Two use Dalsa chips one uses a Phase, back one a Mamiya back, one a Leaf back, all "branded" by Mamiya, one tethers in C-1, one in LC11 one in ZD software to lightroom and even for professionals that work day in and day out, they don't know the difference or for that matter care.
Then the naming, an Aptus 22 is 22mpx, Aptus 54s is 22mpx, a Leaf Aptus 5 is the same 22mpx a P40 + 31 mpx. Who keeps thinking this stuff up?
As far as open camera systems that means little as medium format cameras are cheap compared to the backs. Who is ever going to worry about their Mamiya Camera taking a different makers back when the camera costs 4 or 5 grand, the back cost $40,000?
The camera and back makers can go back and forth all day long proclaiming their advantage or dissing the other guy, but in reality they all buy their digital films from Dalsamart and Kodakmart and with the Phase/Leaf/Mamiya company have so many variations of the same theme even most dealers can't keep up.
The only thing that keeps digital backs proprietary is their software and their camera mount. Those are decisions made by the camera makers, not a photographer because no photographer would buy a film that only worked in one camera and one lab and no photographer would name a film with three separate names. Yes I know most digital files work in lightroom or Camera Raw but they look a lot different out of the can in those softwares, than the makers software/processing suite.
I know Medium format wants to sell product but they make the buying process complicated, even more the using process. I wouldn't buy a Leaf/Mamiya branded product without the dealer, the maker and my lawyer all signing a document stating who warranties what, what software can I use and what is the exact costs of warranties, software and "warranty upgrades", lens deliveries including turn around times.
I'd probably want it signed in blood.
BC
