Chronophotography

For other uses, see Chronophotography (disambiguation).

An example of chronophotography. Woman Walking Down Stairs, late 19th century. Photographed by Eadweard Muybridge.

Chronophotography is an antique photographic technique from the Victorian era (beginning about 1867-68), which captures movement in several frames of print. These prints can be subsequently arranged either like animation cels or layered in a single frame. It is a predecessor to cinematography and moving film involving a series of different cameras, originally created and used for the scientific study of movement.

Definition

Chronophotography is defined as “a set of photographs of a moving object, taken for the purpose of recording and exhibiting successive phases of motion.” The term Chronophotography was coined by French physicist Étienne-Jules Marey to describe photographs of movement from which measurements and study of motion could be derived. It is so called due to the Greek word "chronos" (time) combined with photography.

History

Étienne-Jules Marey: Albert Londe's 12-lens camera, 1893

Photography is an art and science which was invented and developed beginning in the 1830s. Initially, it was used as a documentation device – for portraiture, historical moments, battles in war, and so on. With how rapidly the technological and artistic world began to develop, new uses and ideas for the camera also began to develop. With the invention of the camera, art no longer necessarily had to capture life. The camera became the dominant source of accurate depiction of life. As the technology became more sophisticated, so did the activities for which people needed cameras.

As early as the late 1860s, photographers were able to make “moving pictures” out of prints of photos, taken in rapid succession, of a moving object. This stop-action technique led to the early development of Chronophotography. In 1872, Leland Stanford, former governor of California and horse enthusiast, hired Eadweard Muybridge to provide photographic proof that a running horse had all four hooves off the ground.

Setting a course with cameras whose shutters released via tripwire, he photographed the horse as it galloped past each camera, and organized the photos in order on the edges of a drum-like cylinder, called a zoetrope. When spun, the zoetrope’s images imitate moving film.

The images of the horse caused astonishment in the public, as no one had seen such precise documentation of the movement of the animal. Muybridge was subsequently commissioned to photograph a variety of other moving subjects.

In 1878 neurologist Jean-Martin Charcot hired Albert Londe as a medical photographer at the Salpêtrière. In 1882 Londe devised a system to photograph the physical and muscular movements of patients, including epileptic seizures. He accomplished this by using a camera with nine lenses that were triggered by electromagnetic energy, and with the use of a metronome, that enabled him to sequentially time the release of the shutters. This configuration took photos onto glass plates in quick succession. A few years later Londe developed a camera with twelve lenses for photographing movement. Londe's camera was used for medical studies of muscle movement in subjects performing actions as diverse as those of a tightrope-walking and blacksmithing. The sequence of twelve pictures could be created for durations from 1/10th of a second to several seconds. Although the apparatus was used primarily for medical research, Londe noted that it was portable, and he used it for other subjects - for example, horses and other animals and ocean waves. General Sobert developed, in conjunction with Londe, a chronophotographic device used to study ballistics. With Étienne-Jules Marey (1830-1904), Londe performed many photographic experiments concerning movement, and the layout of his laboratory at the Salpêtrière was similar to Marey's renowned Station Physiologique.

Physicist Étienne-Jules Marey began using the technique to more closely study movement, flight, and exercise. He soon discovered that by overlapping celluloid prints on top of one another, he was able to see phases of movement and study their relations to each other in a single frame.

Georges Demeny, Marey’s assistant, developed even further applications for the reproduction of movement, primarily in creating a simple projector called the stroboscope. He and German photographer Ottomar Anschutz shared the development of projecting technology, using chronophotographs and projectors to create movement much like the projection we know today. Anschutz carried this concept even further, developing chronophotographs to run through his projectors as entertainment. Anschutz then managed to develop a folding hand camera with a “focal-plane shutter,” an early model of a folding bellows, and a flatbed-type press camera that allowed photos to be taken at 1/1000 second exposures. This enabled a faster setup of Muybridge’s multiple-camera system, able to take more exposures faster due to the rapidity of the shutter speed. He also invented a personal viewer for his chronophotographs, a revolving disk in which the photos could be viewed due to illumination from an electric spark (rather than projection). Chronophotographic inventions following those of the “inventors of the cinema” (Muybridge, Marey, Demeny, and Anscutz) became the foundations upon which cinematic film was created.

Process

Setting up a sequence of cameras to photograph the movement of a subject as it progresses in locomotion originally created Chronophotographs. This could be done via tripwire or electrically timed shutter release attached to each individual camera. The photographer then paired together a sequence of twelve different wet-plate photographic prints of the subject in motion. The subject could range from a running horse to a human descending stairs, or inanimate objects being thrown, launched, or falling. To overlap the phases of movement on a single plate, like the work of Marey and Demeny, a photographer would fix a single plate by using strips of celluloid for each separate, irregular image. Marey also later developed a device, called a “gun,” which took twelve successive photographs on a set of discs. The disc contained 12 openings around its circumference. In front of this disc was a second disc pierced with a slit. Pressing the trigger of the gun began a mechanism to rotate the discs. The disc carrying the 12 frames rotated 1/12 of a revolution while the disc carrying the shutter slit revolved once, so that each of the 12 openings appeared in turn behind the lens and was exposed through the slit. [3] When printed, it gave the same effect as his layering process. (Eventually, Marey was able to photograph on actual rolls of film and project the frames in sequence.) Depending on the purpose of the chronophotograph, it could later be affixed to any of several devices either to be displayed in motion or to compare phases of motion in layers.

Uses

Chronophotography’s original purpose was to help scientists study objects in motion, primarily humans and animals. It was also used for practical purposes, such as judging timed events and recording historical ones (horse and dog races, performances) and studying the movement of projectiles for war. With Anschutz’s development of non-scientific, entertaining Chronophotographs, chronophotography became the basis for the invention and development of cinematography. Due to the development of projection devices, (the zoetrope, Marey’s zoopraxiscope, Anschutz’s Schnellseher, and ultimately, Albert Londe’s high-speed multi-exposure camera which ran film through a projector in a new way), the display of chronophotographs as entertainment became more sophisticated and useful than ever before. Before long, cinematic devices spawned from original chronophotographic predecessors, with which audiences could watch continuous loops of entertaining activities (for example, the “peep show” devices built using Thomas Edison’s backlighting technology which showed mildly smutty films) . From these developments in history, cinematography and silent film of moving images were invented.