Choose a subject in front of a background with depth. Select your shortest focal length and take a close low viewpoint, below your subject. Find a natural point of focus and take the shot.
You’ll see that a very wide lens together with a close viewpoint creates extreme perspective distortion. Gently receding lines become extreme diagonals and rounded forms bulge towards the camera. Space appears to expand. The low viewpoint adds a sense of monumentality, making the subject seem larger than it is, and tilting the camera adds to the effect as vertical lines dramatically converge. Not the ideal combination for a portrait shot!
For this exercise, I took a shot around Hucknall Train Station. For this shot I used a Canon 7D (crop sensor) with a Canon 70-300mm lens set at ISO 200 and shutter priority 1/250, f/8, 70mm.
The following shot was taken:
By taking the shot from below, the top of the card reader appears wider than it should. If this were a human face, shooting from this perspective would give an odd shaped result!