cwmartin: If Sigma has any real hope of selling large quantities of this camera, then they will have to offer it in a Nikon and Canon lens mount version. People have large investments in their lens systems, either Nikon or Canon. Sigma should leverage those bases by doing what they do with their lenses, make the camera available to be compatible with the two largest lens bases. Only then will the camera be given a hard look by people with other camera systems.
This was the business case from Sigma as I remember it: the SD1 is a 46mp camera (whether it is, or not, is another matter) – we will price comparatively with other 46mp cameras (i.e., med. formt digi). Ergo, the outrageous price for an APS-C camera. The result? The cameras didn't sell – neither in absolute numbers nor in comparison with competitors. The price drop could not be a clearer admission of the failure to price the camera correctly initially. If the camera were selling box-office, I CAN ASSURE YOU that the price would not be reduced. As someone earlier astutely observed, Sigma's job is to make money: if they were making money with the cameras priced at $9000 with robust demand, business logic would dictate that the price remain the same or go even higher. The price drop has nothing to do with improved economies of scale or any such nonsense, as Sigma would internalized any such savings into its profits - but there are no profits because the cameras aren't selling.