You can check out the going rate for several models of digital backs at our website:
Demo Digital Back ListI think you need to do more research or speak with a dealer though before buying.
"exceed the image quality of say a Sony A850 full frame camera with good Zeiss glass" may seem like a straight forward statement to you, but in reality you need to answer a lot of questions about what you want to use the camera for, what situations it will be in, what areas of image quality are most important for you etc.
For instance if you're doing night-time photography then there are many digital backs that can't expose beyond 15-20 seconds without significant noise. If for instance you want to shoot landscape you should at least give some research to a
tech camera before buying the back since some backs cannot be used, or are less convenient to use, on such a camera. If you are shooting fashion then you need to decide how important flash sync speed is to your lighting/shooting style. etc etc.
Maybe for instance you're looking to shoot sports and wild-life in which case no MF system is going to improve your IQ (it would more likely reduce your IQ since MF does not excel in those applications).
A good dealer spends his entire day helping customers get through such questions (and asking the questions the customer doesn't even know they need to ask) very quickly.
A shameless plug to be sure, but one that is grounded in watching many people start their search with a price rather than by understanding their needs and the variety of options that address (or don't address) those needs.
Doug Peterson
(e-mail Me)__________________
Head of Technical Services, Capture Integration
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