To my nascent review of the Pentax 645D in Medium Format, I’ve posted the first few pages, including my usual high-res examples and crops. Much more is to come, but I felt sure that some readers would like an immediate take on the 645D.
Not interested in medium format? Understanding medium format is a good strategy for some idea of what a 30-40MP DSLR might be able to deliver.
Image quality with 30 second exposures is excellent.