@Eric: I just got back from Arches National shooting the P65+ (http://www.doug-peterson.com/wordpress/2009/04/moab-in-color/). There is nothing like this in the world, including 8x10 film. Gregory Crewdson just purchased one and he was a bastion of 8x10 film for a very long time.
This back is immediately available for rental (ships anywhere) and for purchase through Phase One Dealers such as Capture Integration (that's us - shameless plug - www.captureintegration.com). We're experts and training / instruction is part of the deal.
This is smaller than full frame for medium format; it is effectively a smaller version of the $43,000 P65+ which is the world's only TRUE medium format full frame camera.
Huge billboards don't actually require much resolution since they are viewed from many hundreds of yards. These backs are used in high end commercial and fine art applications where the desire is the highest possible quality.
Image quality is a total-system result: lens quality, sensor size, sensor resolution, A/D converter all play a role. Suffice it to say that these kick the butt of any dSLR in final image quality.
One easy to see example of where image quality means much more than resolution is dynamic range; dSLRs will blow out to white or render detail-less blacks much more often than a digital back which can capture a much higher dynamic range. This can be visible at almost any print size and is independent of resolution.
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@Eric: I just got back from Arches National shooting the P65+ (http://www.doug-peterson.com/wordpress/2009/04/moab-in-color/). There is nothing like this in the world, including 8x10 film. Gregory Crewdson just purchased one and he was a bastion of 8x10 film for a very long time.
This back is immediately available for rental (ships anywhere) and for purchase through Phase One Dealers such as Capture Integration (that's us - shameless plug - www.captureintegration.com). We're experts and training / instruction is part of the deal.
This is smaller than full frame for medium format; it is effectively a smaller version of the $43,000 P65+ which is the world's only TRUE medium format full frame camera.
Huge billboards don't actually require much resolution since they are viewed from many hundreds of yards. These backs are used in high end commercial and fine art applications where the desire is the highest possible quality.
Image quality is a total-system result: lens quality, sensor size, sensor resolution, A/D converter all play a role. Suffice it to say that these kick the butt of any dSLR in final image quality.
One easy to see example of where image quality means much more than resolution is dynamic range; dSLRs will blow out to white or render detail-less blacks much more often than a digital back which can capture a much higher dynamic range. This can be visible at almost any print size and is independent of resolution.