Nikon 19mm TS PC Lens for architectural photography Perspective Control (PC or Tilt-Shift) lenses are specialized lenses that allow tilting (Tilt) or shifting (Shift) the optical elements to correct geometric distortions, such as the convergence of vertical lines in architectural photography, or to precisely control the depth of field. They are essential for professionals for interior and exterior architectural photography and real estate photography. Attached are results from the Tilt-Shift lens.