The Schneider PC TS Apo-Digitar 120mm f/5.6 Lens (For Mamiya/Phase One) gives you the same types of controls used by large format cameras to control perspective, but for your Mamiya/Phase One medium format camera. There's both a parallel shift to reduce or eliminate converging lines or perspective distortion ("keystone correction") and a swinging or tilting of the lens according to Scheimpflug's rule to better utilize depth of field (DOF) without an increase in diffraction from stopping down the aperture further and reducing sharpness.
