Time-Lapse Photography Art and Techniques by Mark Higgins

This is the same view but the perspective has been corrected with movements on a tilt and shift lens.
The camera is in exactly the same place as the previous image, but the perceived perspective has
been changed by moving the lens.
Changing perspective in your imagery can be done either with one of these lenses or with software
in the camera or on a computer. Software is a much cheaper solution than buying a lens, but a lens
will produce much better results. If you play with the perspective with software you might lose the
edges of your image as it pulls and stretches the file to emulate what the lens would be doing
optically. These lenses are particularly useful when shooting time-lapse near anything tall such as
buildings, trees or mountains.