Tilt-shift lenses are some of the more exotic hunks of glass out there, but they enable some very unique capabilities that simply can't be accomplished with normal lenses. This interesting video shows how their shift capabilities can be used to easily create panoramic images.
Coming to you from First Man Photography, this video shows him as he spends some time using the Canon TS-E 24mm f/3.5L II Tilt-Shift Lens to shoot some panoramas. Tilt-shift lenses are traditionally used by people like architectural photographers to obviate the issue of converging parallels and related problems or by landscape photographers to get increased depth of field at the same aperture. You might have also seen them used to create "miniature" worlds. The shift function can also be used to create panoramas that stitch together almost effortlessly, so long as there aren't prominent foreground subjects. Technically, to completely avoid parallax error, the camera itself would have to be shifted while the lens remained stationary, thereby allowing the sensor to simply pick up more of the image circle without the projected image changing. However, for images like those shown in the video, a tilt-shift lens works very well without having to resort to a view camera.