Quote Originally Posted by darinwc View Post
Actually benjiboy is incorrect. Diapositivo was referring to barrel or pincushion distortion, where straight lines bend due to lens distortion.

Converging verticals, a result of the angle of the camera, is not 'distortion', it is just perspective. The lines of a building will still be perfectly straight.
Perspective distorsion refers to extreme difference in reproduction scale within a subject. This will be due to the subject-camera distance being of the magnitude as the distances within the subject itself. This is easily achieved by employing wide-angle lenses.

Though those converging lines are a matter of perspective or rather the inclination between subject- and film plane, the angle of convergence can be influenced by perspective distorsion. Thus both phenoma can add to each other.