This Mamiya Leaf Aptus-II 56 Digital Back is compatible with the Mamiya 645AFD. This digital back provides 56Mp of resolution from a 56 x 36mm CCD image sensor with 9334 x 6000 pixels. Perhaps more impressive, however, is the collaboration that brought this back to fruition. Mamiya, Leaf, Phase One, and Schneider all came together to create one of the world's most sensitive and formidable imaging devices. The monster sensor, with its 16 bit color palette sends garden-variety DSLRs running scared, with image quality that's beyond phenomenal.