Official Pentax 645D Sample Images
Pentax has posted five full-resolution sample photographs captured with a Pentax 645D medium format digital SLR camera. Taken using four different lenses, all of these sample images have a resolution of 7264×5440 pixels, and were shot at three different ISO settings; ISO 200, 320 and 800. EXIF data is available.
Website: Pentax 645D Samples