Robert,
It all depends what are your requests to this DB. There are issues like "long exposure times", "size of the sensor vs shift possibilities vs lenses to be used", "white shadings to be applied in a batch", etc ...
- When it comes to "long exposure times" (understand over 30"), I think everybody agrees that the PO 45+ is the winner of all categories available.
- Sensor size vs shift possibilities vs lenses used is something you have to think about carefully, depending on your needs.
- Now, concerning "white shadings" (LCC), there is something to think about. If there is just a few LCCs to be applied and a few files a day to be corrected this way, there isn't much of a concern, each back and software can handle it very well nowadays. However, should you have dozen or hundreds a day to correct, then you should be carefully thinking about which back. AFAIK, C1 is not able to handle such LLCs in a batch and automated process as can do it e.g. Sinar eXposure (unfortunately not longer available and not longer supported, and Captureshop did not integrate this part of eXposure). Architecture photographer Rainer Viertlböck (member here) is one of those photographers shooting exclusively architecture and in this having daily dozen of LLC corrections to do. He used to work with Sinarbacks and the eXposure SW, for which he helped to integrate the "batch process" for LCCs. Then happened what happened with eXposure and Sinar, and having spoken with Rainer recently I know that he is now working with a Leaf back and LC SW which is the best adapted for his workflow in terms of LCC corrections. I don't say that this is an important point for you, when shooting architecture, but it has to be considered when a lot of LCCs have to be processed daily. In this case choosing one workflow or the other can save hours of time in terms of LCC corrections.
Just my cent to the debate.
Best
Thierry
What do you think is the BEST digital back for architecture interior? Sinar, Hasselblad, Phase-One or Leaf.
Gr