A movie camera (also known as a film camera and cine-camera) is a type of photographic camera that rapidly takes a sequence of photographs, either onto film stock or an image sensor, in order to produce a moving image to display on a screen. In contrast to the still camera, which captures a single image at a time, the movie camera takes a series of images by way of an intermittent mechanism or by electronic means; each image is a frame of film or video. The frames are projected through a movie projector or a video projector at a specific frame rate (number of frames per second) to show the moving picture. When projected at a high enough frame rate (24 frames per second or more), the persistence of vision allows the eyes and brain of the viewer to merge the separate frames into a continuous moving picture.[1]
An interesting forerunner to the movie camera was the machine invented by Francis Ronalds at the Kew Observatory in 1845. A photosensitive surface was drawn slowly past the aperture diaphragm of the camera by a clockwork mechanism to enable continuous recording over a 12- or 24-hour period. Ronalds applied his cameras to trace the ongoing variations of scientific instruments and they were used in observatories around the world for over a century.[2][3][4]
The chronophotographic gun invented by Étienne-Jules Marey.
The chronophotographic gun was invented in 1882 by Étienne-Jules Marey, a French scientist and chronophotographer. It could shoot 12 images per second and was the first invention to capture moving images on the same chronomatographic plate using a metal shutter.[5]
Charles Kayser of the Edison lab seated behind the Kinetograph. Portability was not among the camera's virtues.
In 1876, Wordsworth Donisthorpe proposed a camera to take a series of pictures on glass plates, to be printed on a roll of paper film. In 1889, he would patent a moving picture camera in which the film moved continuously. Another film camera was designed in England by Frenchman Louis Le Prince in 1888. He had built a 16 lens camera in 1887 at his workshop in Leeds. The first 8 lenses would be triggered in rapid succession by an electromagnetic shutter on the sensitive film; the film would then be moved forward allowing the other 8 lenses to operate on the film. After much trial and error, he was finally able to develop a single-lens camera in 1888, which he used to shoot sequences of moving pictures on paper film, including the Roundhay Garden Scene and Leeds Bridge.
In June 1878, Eadweard Muybridge created sequential series of photographs with a battery of 12 cameras along the race track at Stanford's Palo Alto Stock Farm (now the campus of Stanford University). The shutters were automatically triggered when the wheel of a cart or the breast or legs of a horse tripped wires connected to an electromagnetic circuit.
Another early pioneer was the British inventor William Friese-Greene. In 1887, he began to experiment with the use of paper film, made transparent through oiling, to record motion pictures. He also said he attempted using experimental celluloid, made with the help of Alexander Parkes. In 1889, Friese-Greene took out a patent for a moving picture camera that was capable of taking up to ten photographs per second. Another model, built in 1890, used rolls of the new Eastman celluloid film, which he had perforated. A full report on the patented camera was published in the British Photographic News on February 28, 1890.[6] He showed his cameras and film shot with them on many occasions, but never projected his films in public. He also sent details of his invention to the American inventor Thomas Edison in February 1890,[7] which was also seen by Dickson (see below).
Film-gun at the Institut Lumière, FranceWalking around a movie film camera at a museum in Japan.
William Kennedy Laurie Dickson, a Scottish inventor and employee of Edison, designed the Kinetograph Camera in 1891. The camera was powered by an electric motor and was capable of shooting with the new sprocketed film. To govern the intermittent movement of the film in the camera, allowing the strip to stop long enough so each frame could be fully exposed and then advancing it quickly (in about 1/460 of a second) to the next frame, the sprocket wheel that engaged the strip was driven by an escapement disc mechanism—the first practical system for the high-speed stop-and-go film movement that would be the foundation for the next century of cinematography.[8]
The Lumière Domitor camera, owned by brothers Auguste and Louis Lumière, was created by Charles Moisson, the chief mechanic at the Lumière works in Lyon in 1894. The camera used paper film 35 millimeters wide, but in 1895, the Lumière brothers shifted to celluloid film, which they bought from New-York's Celluloid Manufacturing Co. This they covered with their own Etiquette-bleue emulsion, had it cut into strips and perforated.
The Aeroscope (1909) was the first hand-held movie camera.
Due to the work of Le Prince, Friese-Greene, Edison, and the Lumière brothers, the movie camera had become a practical reality by the mid-1890s. The first firms were soon established for the manufacture of movie camera, including Birt Acres, Eugene Augustin Lauste, Dickson, Pathé frères, Prestwich, Newman & Guardia, de Bedts, Gaumont-Démény, Schneider, Schimpf, Akeley, Debrie, Bell & Howell, Leonard-Mitchell, Ertel, Ernemann, Eclair, Stachow, Universal, Institute, Wall, Lytax, and many others.
The Aeroscope was built and patented in England in the period 1909–1911 by Polish inventor Kazimierz Prószyński.[14] Aeroscope was the first successful hand-held operated film camera. The cameraman did not have to turn the crank to advance the film, as in all cameras of that time, so he could operate the camera with both hands, holding the camera and controlling the focus. This made it possible to film with the Aeroscope in difficult circumstances including from the air and for military purposes.[15]
The first all-metal cine camera was the Bell & Howell Standard of 1911-12.[16] One of the most complicated models was the Mitchell-Technicolor Beam Splitting Three-Strip Camera of 1932. With it, three colour separation originals are obtained behind a purple, a green, and a red light filter, the latter being part of one of the three different raw materials in use.
In 1923, Eastman Kodak introduced a 16mm film stock, principally as a lower-cost alternative to 35mm and several camera makers launched models to take advantage of the new market of amateur movie-makers. Thought initially to be of inferior quality to 35mm, 16mm cameras continued to be manufactured until the 2000s by the likes of Bolex, Arri, and Aaton.
Since the 2010s, digital movie cameras have become the dominant type of camera in the motion picture industry, being employed in film, television productions and even (to a lesser extent) video games. In response to this, movie director Martin Scorsese started the non-profit organisation The Film Foundation to preserve the use of film in movie making—as many filmmakers feel DSLR cameras do not convey the depth or emotion that motion-picture film does. Other major directors involved in the organisation include Quentin Tarantino, Christopher Nolan and many more.[17]
Basic operation: When the shutter inside the camera is opened, the film is illuminated. When the shutter is completely covering the film gate, the film strip is being moved one frame further by one or two claws which advance the film by engaging and pulling it through the perforations.
Most of the optical and mechanical elements of a movie camera are also present in the movie projector. The requirements for film tensioning, take-up, intermittent motion, loops, and rack positioning are almost identical. The camera will not have an illumination source and will maintain its film stock in a light-tight enclosure. A camera will also have exposure control via an iris aperture located on the lens. The righthand side of the camera is often referred to by camera assistants as "the dumb side" because it usually lacks indicators or readouts and access to the film threading, as well as lens markings on many lens models. Later equipment often had done much to minimize these shortcomings, although access to the film movement block by both sides is precluded by basic motor and electronic design necessities. Advent of digital cameras reduced the above mechanism to a minimum removing much of the shortcomings.
The standardized frame rate for commercial sound film is 24 frames per second.[18] The standard commercial (i.e., movie-theater film) width is 35 millimeters, while many other film formats exist. The standard aspect ratios are 1.66, 1.85, and 2.39 (anamorphic). NTSC video (common in North America and Japan) plays at 29.97 frame/s; PAL (common in most other countries) plays at 25 frames. These two television and video systems also have different resolutions and color encodings. Many of the technical difficulties involving film and video concern translation between the different formats. Video aspect ratios are 4:3 (1.33) for full screen and 16:9 (1.78) for widescreen.
Multiple cameras may be placed side-by-side to record a single angle of a scene and repeated throughout the runtime. The film is then later projected simultaneously, either on a single three-image screen (Cinerama) or upon multiple screens forming a complete circle, with gaps between screens through which the projectors illuminate an opposite screen. (See Circle-Vision 360°) Convex and concave mirrors are used in cameras as well as mirrors.
One of the problems in film is synchronizing a sound recording with the film. Most film cameras do not record sound internally; instead, the sound is captured separately by a precision audio device (see double-system recording). The exceptions to this are the single-system news film cameras, which had either an optical—or later—magnetic recording head inside the camera. For optical recording, the film only had a single perforation and the area where the other set of perforations would have been was exposed to a controlled bright light that would burn a waveform image that would later regulate the passage of light and playback the sound. For magnetic recording, that same area of the single perf 16mm film that was prestriped with a magnetic stripe. A smaller balance stripe existed between the perforations and the edge to compensate the thickness of the recording stripe to keep the film wound evenly.
Double-system cameras are generally categorized as either "sync" or "non-sync." Sync cameras use crystal-controlled motors that ensure that film is advanced through the camera at a precise speed. In addition, they're designed to be quiet enough to not hamper sound recording of the scene being shot. Non-sync or "MOS" cameras do not offer these features; any attempt to match location sound to these cameras' footage will eventually result in "sync drift", and the noise they emit typically renders location sound recording useless.
To synchronize double-system footage, the clapper board which typically starts a take is used as a reference point for the editor to match the picture to the sound (provided the scene and take are also called out so that the editor knows which picture take goes with any given sound take). It also permits scene and take numbers and other essential information to be seen on the film itself. Aaton cameras have a system called AatonCode that can "jam sync" with a timecode-based audio recorder and prints a digital timecode directly on the edge of the film itself. However, the most commonly used system at the moment is unique identifier numbers exposed on the edge of the film by the film stock manufacturer (KeyKode is the name for Kodak's system). These are then logged (usually by a computer editing system, but sometimes by hand) and recorded along with audio timecode during editing. In the case of no better alternative, a handclap can work if done clearly and properly, but often a quick tap on the microphone (provided it is in the frame for this gesture) is preferred.
One of the most common uses of non-sync cameras is the spring-wound cameras used in hazardous special effects, known as "crash cams". Scenes shot with these have to be kept short or resynchronized manually with the sound. MOS cameras are also often used for second unit work or anything involving slow or fast-motion filming.
With the advent of digital cameras, synchronization became a redundant term, as both visual and audio is simultaneously captured electronically.
Movie cameras were available before World War II often using the 9.5 mm film format or 16 mm format. The use of movie cameras had an upsurge in popularity in the immediate post-war period giving rise to the creation of home movies. Compared to the pre-war models, these cameras were small, light, fairly sophisticated and affordable.
An extremely compact 35mm movie camera Kinamo was designed by Emanuel Goldberg for amateur and semi-professional movies in 1921. A spring motor attachment was added in 1923 to allow flexible handheld filming. The Kinamo was used by Joris Ivens and other avant-garde and documentary filmmakers in the late 1920s and early 1930s.[19][20]
While a basic model might have a single fixed aperture/focus lens, a better version might have three or four lenses of differing apertures and focal lengths on a rotating turret. A good quality camera might come with a variety of interchangeable, focusable lenses or possibly a single zoom lens. The viewfinder was normally a parallel sight within or on top of the camera body. In the 1950s and for much of the 1960s these cameras were powered by clockwork motors, again with variations of quality. A simple mechanism might only power the camera for some 30 seconds, while a geared drive camera might work for as long as 75 – 90 seconds (at standard speeds).
The common film used for these cameras was termed Standard 8, which was a strip of 16-millimetre wide film which was only exposed down one half during shooting. The film had twice the number of perforations as film for 16mm cameras and so the frames were half as high and half as wide as 16mm frames. The film was removed and placed back in the camera to expose the frames on the other side once the first half had been exposed. Once the film was developed it was sliced down the middle and the ends attached, giving 50-foot (15m) of Standard 8 film from a spool of 25-foot (7.6m) of 16mm film. 16mm cameras, mechanically similar to the smaller format models, were also used in home movie making but were more usually the tools of semi professional film and news film makers.
In the 1960s a new film format, Super8, coincided with the advent of battery-operated electric movie cameras. The new film, with a larger frame print on the same width of film stock, came in a cassette that simplified changeover and developing. Another advantage of the new system is that they had the capacity to record sound, albeit of indifferent quality. Camera bodies, and sometimes lenses, were increasingly made in plastic rather than the metals of the earlier types. As the costs of mass production came down, so did the price and these cameras became very popular.
This type of format and camera was more quickly superseded for amateurs by the advent of digital video cameras in the 2000s. Since the 2010s, amateurs increasingly started preferring smartphone cameras.[citation needed]
Film stock is an analog medium that is used for recording motion pictures or animation. It is recorded on by a movie camera, developed, edited, and projected onto a screen using a movie projector. It is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine the sensitivity, contrast and resolution of the film. The emulsion will gradually darken if left exposed to light, but the process is too slow and incomplete to be of any practical use. Instead, a very short exposure to the image formed by a camera lens is used to produce only a very slight chemical change, proportional to the amount of light absorbed by each crystal. This creates an invisible latent image in the emulsion, which can be chemically developed into a visible photograph. In addition to visible light, all films are sensitive to X-rays and high-energy particles. Most are at least slightly sensitive to invisible ultraviolet (UV) light. Some special-purpose films are sensitive into the infrared (IR) region of the spectrum.
35 mm film is a film gauge used in filmmaking, and the film standard. In motion pictures that record on film, 35 mm is the most commonly used gauge. The name of the gauge is not a direct measurement, and refers to the nominal width of the 35 mm format photographic film, which consists of strips 1.377 ± 0.001 inches (34.976 ± 0.025 mm) wide. The standard image exposure length on 35 mm for movies is four perforations per frame along both edges, which results in 16 frames per foot of film.
70 mm film is a wide high-resolution film gauge for motion picture photography, with a negative area nearly 3.5 times as large as the standard 35 mm motion picture film format. As used in cameras, the film is 65 mm (2.6 in) wide. For projection, the original 65 mm film is printed on 70 mm (2.8 in) film. The additional 5 mm contains the four magnetic stripes, holding six tracks of stereophonic sound. Although later 70 mm prints use digital sound encoding, the vast majority of existing and surviving 70 mm prints pre-date this technology.
16 mm film is a historically popular and economical gauge of film. 16 mm refers to the width of the film ; other common film gauges include 8 mm and 35 mm. It is generally used for non-theatrical film-making, or for low-budget motion pictures. It also existed as a popular amateur or home movie-making format for several decades, alongside 8 mm film and later Super 8 film. Eastman Kodak released the first 16 mm "outfit" in 1923, consisting of a camera, projector, tripod, screen and splicer, for US$335. RCA-Victor introduced a 16 mm sound movie projector in 1932, and developed an optical sound-on-film 16 mm camera, released in 1935.
8 mm film is a motion picture film format in which the film strip is eight millimetres (0.31 in) wide. It exists in two main versions – the original standard 8 mm film, also known as regular 8 mm, and Super 8. Although both standard 8 mm and Super 8 are 8 mm wide, Super 8 has a larger image area because of its smaller and more widely spaced perforations.
Super 8 mm film is a motion-picture film format released in 1965 by Eastman Kodak as an improvement over the older "Double" or "Regular" 8 mm home movie format.
9.5 mm film is an amateur film format introduced by Pathé in 1922 as part of the Pathé Baby amateur film system. It was conceived initially as an inexpensive format to provide copies of commercially made films to home users, although a simple camera was released shortly afterwards.
IMAX is a proprietary system of high-resolution cameras, film formats, film projectors, and theaters known for having very large screens with a tall aspect ratio and steep stadium seating, with the 1.43:1 ratio format being available only in few selected locations.
Cinematography is the art of motion picture photography.
A movie projector is an opto-mechanical device for displaying motion picture film by projecting it onto a screen. Most of the optical and mechanical elements, except for the illumination and sound devices, are present in movie cameras. Modern movie projectors are specially built video projectors.
Negative pulldown is the manner in which an image is exposed on a film stock, described by the number of film perforations spanned by an individual frame. It can also describe whether the image captured on the negative is oriented horizontally or vertically. Changing the number of exposed perforations allows a cinematographer to change both the aspect ratio of the image and the size of the area on the film stock that the image occupies.
Kazimierz Prószyński was a Polish inventor active in the field of cinematography. He patented his first film camera, called Pleograph, before the Lumière brothers, and later went on to improve the cinema projector for the Gaumont company. He was also the inventor of the widely used first hand-held Aeroscope camera.
Todd-AO is an American post-production company founded in 1953 by Mike Todd and Robert Naify, providing sound-related services to the motion picture and television industries. For more than five decades, it was the worldwide leader in theater sound. The company retains one facility, in the Los Angeles area.
Techniscope or 2-perf is a 35 mm motion picture camera film format introduced by Technicolor Italia in 1960. The Techniscope format uses a two film-perforation negative pulldown per frame, instead of the standard four-perforation frame usually exposed in 35 mm film photography. Techniscope's 2.33:1 aspect ratio is easily enlarged to the 2.39:1 widescreen ratio, because it uses half the amount of 35 mm film stock and standard spherical lenses. Thus, Techniscope release prints are made by anamorphosing, enlarging each frame vertically by a factor of two.
The Academy ratio of 1.375:1 is an aspect ratio of a frame of 35 mm film when used with 4-perf pulldown. It was standardized by the Academy of Motion Picture Arts and Sciences as the standard film aspect ratio in 1932, although similar-sized ratios were used as early as 1928.
Hand-held camera or hand-held shooting is a filmmaking and video production technique in which a camera is held in the camera operator's hands as opposed to being mounted on a tripod or other base. Hand-held cameras are used because they are conveniently sized for travel and because they allow greater freedom of motion during filming. Newsreel camera operators frequently gathered images using a hand-held camera. Virtually all modern video cameras are small enough for hand-held use, but many professional video cameras are designed specifically for hand-held use such as for electronic news-gathering (ENG), and electronic field production (EFP).
A home movie is a short amateur film or video typically made just to preserve a visual record of family activities, a vacation, or a special event, and intended for viewing at home by family and friends. Originally, home movies were made on photographic film in formats that usually limited the movie-maker to about three minutes per roll of costly camera film. The vast majority of amateur film formats lacked audio, shooting silent film.
This article summarized the comparison of movie cameras.
Pleograph was an early type of movie camera constructed in 1894, before those made by the Lumière brothers, by Polish inventor Kazimierz Prószyński.
The history of film technology traces the development of techniques for the recording, construction and presentation of motion pictures. When the film medium came about in the 19th century, there already was a centuries old tradition of screening moving images through shadow play and the magic lantern that were very popular with audiences in many parts of the world. Especially the magic lantern influenced much of the projection technology, exhibition practices and cultural implementation of film. Between 1825 and 1840, the relevant technologies of stroboscopic animation, photography and stereoscopy were introduced. For much of the rest of the century, many engineers and inventors tried to combine all these new technologies and the much older technique of projection to create a complete illusion or a complete documentation of reality. Colour photography was usually included in these ambitions and the introduction of the phonograph in 1877 seemed to promise the addition of synchronized sound recordings. Between 1887 and 1894, the first successful short cinematographic presentations were established. The biggest popular breakthrough of the technology came in 1895 with the first projected movies that lasted longer than 10 seconds. During the first years after this breakthrough, most motion pictures lasted about 50 seconds, lacked synchronized sound and natural colour, and were mainly exhibited as novelty attractions. In the first decades of the 20th century, movies grew much longer and the medium quickly developed into one of the most important tools of communication and entertainment. The breakthrough of synchronized sound occurred at the end of the 1920s and that of full color motion picture film in the 1930s. By the start of the 21st century, physical film stock was being replaced with digital film technologies at both ends of the production chain by digital image sensors and projectors.
References
↑ Anderson, Joseph; Anderson, Barbara (1993). "The Myth of Persistence of Vision Revisited". Journal of Film and Video. 45 (1): 3–12. JSTOR20687993. ProQuest224639484.
↑ Ronalds, B.F. (2016). Sir Francis Ronalds: Father of the Electric Telegraph. London: Imperial College Press. ISBN978-1-78326-917-4.
↑ Braun, Marta, (1992) Picturing Time: The Work of Etienne-Jules Marey (1830–1904), p. 190, Chicago: University of Chicago Press ISBN0-226-07173-1; Robinson, David, (1997) From Peepshow to Palace: The Birth of American Film, p. 28, New York and Chichester, West Sussex, Columbia University Press, ISBN0-231-10338-7)
↑ Spehr, Paul (2008). The Man Who Made Movies: W.K.L. Dickson. UK: John Libbey. pp.105–111.
↑ Gosser (1977), pp. 206–207; Dickson (1907), part 3.
↑ "Polska. Informator", Wydawnictwo Interpress, Warszawa 1977 (in Polish)
↑ Ica and the Kinamo and Joris Evens. In: Buckland, Michael: Emanuel Goldberg and his Knowledge Machine. Libraries Unlimited, 2006. ISBN0-313-31332-6. pp. 85-92 and pp. 92-95
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