The world first “tilt and shift” wide angle lens for 35mm SLR cameras. The “tilt and shift” mechanism changes relation between the lens optical axis and the film plane to obtain special effects. “Tilting” is used to swing the plane of focus so that it is not parallel with the film plane. You can adjust focus using the tilt mechanism to a very shallow or a very deep zone without change of aperture. “Shifting” is used to correct or enhance perspective distortion, shifting the optical axis from the center of the film plane. The tapering off of the building in the picture can corrected by “shifting” the TS lens easily. The “TS” stands for “tilt and shift”.