Trick photography

Trick photography relies on a set of classic in-camera techniques that manipulate the viewer's perception. Double exposure, where two or more images are superimposed on a single frame, creates ghostly or composite scenes; it was popular in the 19th century for spirit photography, which claimed to capture ghosts.¹ Forced perspective aligns subjects at different distances to make them appear to interact, as in the classic "hand holding the Leaning Tower of Pisa" shot. Photomontage, the cutting and pasting of multiple prints, allowed early practitioners to construct impossible scenes before digital tools existed. Other methods include slow shutter speeds to create light trails, and camera movement to produce blur or zoom effects.

The earliest known trick photograph is often attributed to Hippolyte Bayard, who in the 1840s created a self-portrait depicting himself as a drowned man, a staged scene that predates the term "trick photography."² In the Victorian era, spirit photographers like William H. Mumler exploited double exposure to produce images of "ghosts," which were later debunked but fueled public fascination.³ The 20th century saw trick photography flourish in postcards and advertising, with artists like Arthur Fellig (Weegee) using distortion lenses for humorous effects. The advent of digital editing in the 1990s shifted many tricks to software, but classic in-camera methods remain valued for their authenticity.

Several photographers are renowned for their mastery of trick photography. William H. Mumler's spirit photographs, though controversial, are a landmark in the genre's history.³ The surrealist artist Man Ray used solarization and double exposure to create dreamlike images in the 1920s and 1930s.⁴ In the commercial realm, the 1930s postcards of the "Leaning Tower of Pisa" popularized forced perspective. Contemporary artist Erik Johansson combines multiple photographs to construct impossible scenes, while his work is often cited as a modern extension of trick photography.⁵ These practitioners demonstrate the genre's range from playful to profound.

Beyond the famous techniques, trick photography has niche applications and oddities. In the 19th century, "spirit photography" was not only a hoax but also a subject of legal scrutiny, with Mumler tried for fraud in 1869.³ The technique of "slit-scan" photography, used to create surreal streaks, was employed in the 1960s for the title sequence of the film 2001: A Space Odyssey. Another obscure method is "Harris shutter," which uses a rotating filter to produce color fringes in moving subjects, named after its inventor. Trick photography also intersects with scientific imaging, such as high-speed photography that freezes motion, which can appear as a trick but serves research. These edge cases show the genre's breadth.

Double exposure

A technique where two or more images are exposed onto the same frame of film or sensor.

Forced perspective

A method that uses the relative size and distance of objects to create an optical illusion.

Photomontage

The process of combining multiple photographs into a single composite image.

Spirit photography

A 19th-century practice that claimed to capture ghosts in photographs, often using double exposure.