CAMERA

A camera is a device that records/stores images. These images may be still photographs or moving images such as videos or movies. The term camera comes from the camera obscura (Latin for "dark chamber"), an early mechanism for projecting images. The modern camera evolved from the camera obscura.

Cameras may work with the light of the visible spectrum or with other portions of the electromagnetic spectrum. A camera generally consists of an enclosed hollow with an opening (aperture) at one end for light to enter, and a recording or viewing surface for capturing the light at the other end. A majority of cameras have a lens positioned in front of the camera's opening to gather the incoming light and focus all or part of the image on the recording surface. Most 20th century cameras used photographic film as a recording surface, while modern ones use an electronic camera sensor. The diameter of the aperture is often controlled by a diaphragm mechanism, but some cameras have a fixed-size aperture.

A typical still camera takes one photo each time the user presses the shutter button. A typical movie camera continuously takes 24 film frames per second as long as the user holds down the shutter button, or until the shutter button is pressed a second time.
 
HISTORY
The forerunner to the camera was the camera obscura. It was a dark chamber (in Latin, a camera obscura, demonstrating the etymology), "consist[ing] of a darkened chamber or box, into which light is admitted through a pinhole (later a convex lens), forming an image of external objects on a surface of paper or glass, etc., placed at the focus of the lens". In the 6th century, Greek mathematician and architect Anthemius of Tralles used a type of camera obscura in his experiments. The camera obscura was described by the Arabic scientist Ibn al-Haytham (Alhazen) in his Book of Optics (1015–1021). Scientist-monk Roger Bacon also studied the matter. The actual name of camera obscura was applied by mathematician and astronomer Johannes Kepler in his Ad Vitellionem paralipomena of 1604. He later added a lens and made the apparatus transportable, in the form of a tent. English scientist Robert Boyle and his assistantRobert Hooke developed a portable camera obscura in the 1660s.

The first camera obscura that was small and portable enough for practical use was built by Johann Zahn in 1685. At this time there was no way to preserve the images produced by these cameras apart from manually tracing them. However, in 1724, Johann Heinrich Schultz discovered that a silver and chalk mixture darkens under exposure to light. Early photography built on these discoveries and developments. The early photographic cameras were essentially similar to Zahn's camera obscura, though usually with the addition of sliding boxes for focusing. Before each exposure, a sensitized plate would be inserted in front of the viewing screen to record the image. The first permanent photograph was made in 1826 by Joseph Nicéphore Niépce using a sliding wooden box camera made by Charles and Vincent Chevalier in Paris and building on Johann Heinrich Schultz's discovery about silver and chalk mixtures darkening when exposed to light.Jacques Daguerre's popular daguerreotype process utilized copper plates, while the calotype process invented by William Fox Talbot recorded images on paper.

The development of the collodion wet plate process by Frederick Scott Archer in 1850 cut exposure times dramatically, but required photographers to prepare and develop their glass plates on the spot, usually in a mobile darkroom. Despite their complexity, the wet-plate ambrotype and tintype processes were in widespread use in the latter half of the 19th century. Wet plate cameras were little different from previous designs, though there were some models, such as the sophisticated Dubroni of 1864, where the sensitizing and developing of the plates could be carried out inside the camera itself rather than in a separate darkroom. Other cameras were fitted with multiple lenses for making cartes de visite. It was during the wet plate era that the use of bellows for focusing became widespread.

The first color photograph was made by Scottish physicist James Clerk Maxwell, with the help of English inventor and photographer Thomas Sutton, in 1861

The electronic video camera tube was invented in the 1920s, starting a line of development that eventually resulted in digital cameras, which largely supplanted film cameras after the turn of the 21st century.

MECHANISM
Image capture 
19th century studio camera, with bellows for focusing

Traditional cameras capture light onto photographic film or photographic plate. Video and digital cameras use an electronic image sensor, usually a charge coupled device (CCD) or a CMOS sensor to capture images which can be transferred or stored in a memory card or other storage inside the camera for later playback or processing.

Cameras that capture many images in sequence are known as movie cameras or as ciné cameras in Europe; those designed for single images are still cameras. However these categories overlap as still cameras are often used to capture moving images in special effects work and many modern cameras can quickly switch between still and motion recording modes. A video camera is a category of movie camera that captures images electronically (either using analogue or digital technology).

Lens
The lens of a camera captures the light from the subject and brings it to a focus on the film or detector. The design and manufacture of the lens is critical to the quality of the photograph being taken. The technological revolution in camera design in the 19th century revolutionized optical glass manufacture and lens design with great benefits for modern lens manufacture in a wide range of optical instruments from reading glasses to microscopes. Pioneers included Zeiss and Leitz.

Camera lens are made in a wide range of focal lengths. They range from extreme wide angle, wide angle, standard, medium telephoto and telephoto. Each lens is best suited a certain type of photography. The extreme wide angle may be preferred for architecture because it has the capacity to capture a wide view of a building. The normal lens, because it often has a wide aperture, is often used for street and documentary photography. The telephoto is useful for sports, and wildlife but they are more susceptible to camera shake.

FOCUS

Due to the optical properties of photographic lenses, only objects within a limited range of distances from the camera will be reproduced clearly. The process of adjusting this range is known as changing the camera's focus. There are various ways of focusing a camera accurately. The simplest cameras have fixed focusand use a small aperture and wide-angle lens to ensure that everything within a certain range of distance from the lens, usually around 3 metres (10 ft) to infinity, is in reasonable focus. Fixed focus cameras are usually inexpensive types, such as single-use cameras. The camera can also have a limited focusing range orscale-focus that is indicated on the camera body. The user will guess or calculate the distance to the subject and adjust the focus accordingly. On some cameras this is indicated by symbols (head-and-shoulders; two people standing upright; one tree; mountains).

Rangefinder cameras allow the distance to objects to be measured by means of a coupled parallax unit on top of the camera, allowing the focus to be set with accuracy. Single-lens reflex cameras allow the photographer to determine the focus and composition visually using the objective lens and a moving mirror to project the image onto a ground glass or plastic micro-prism screen. Twin-lens reflex cameras use an objective lens and a focusing lens unit (usually identical to the objective lens.) in a parallel body for composition and focusing. View cameras use a ground glass screen which is removed and replaced by either a photographic plate or a reusable holder containing sheet film before exposure. Modern cameras often offer autofocus systems to focus the camera automatically by a variety of methods

Exposure control
The size of the aperture and the brightness of the scene controls the amount of light that enters the camera during a period of time, and the shutter controls the length of time that the light hits the recording surface. Equivalent exposures can be made with a larger aperture and a faster shutter speed or a corresponding smaller aperture and with the shutter speed slowed down.

Shutters
Although a range of different shutter devices have been used during the development of the camera only two types have been widely used and remain in use today.

The Leaf shutter or more precisely the in-lens shutter is a shutter contained within the lens structure, often close to the diaphragm consisting of a number of metal leaves which are maintained under spring tension and which are opened and then closed when the shutter is released. The exposure time is determined by the interval between opening and closing. In this shutter design, the whole film frame is exposed at one time. This makes flash synchronisation much simpler as the flash only needs to fire once the shutter is fully open. Disadvantages of such shutters are their inability to reliably produce very fast shutter speeds ( faster than 1/500th second or so) and the additional cost and weight of having to include a shutter mechanism for every lens.

The focal-plane shutter operates as close to the film plane as possible and consists of cloth curtains that are pulled across the film plane with a carefully determined gap between the two curtains (typically running horizontally) or consisting of a series of metal plates (typically moving vertically) just in front of the film plan. The focal-plane shutter is primarily associated with the single lens reflex type of camera's, since covering the film rather than blocking light passing through the lens allows the photographer to view through the lens at all times except during the exposure itself. Covering the film also facilitates removing the lens from a loaded camera (many SLR's have interchangeable lenses).

Complexities
Professional medium format SLR cameras (typically using 120/220 roll film) use a hybrid solution, since such a large focal-plane shutter would be difficult to make and/or may run slowly. A manually inserted blade known as a dark slide allows the film to be covered when changing lenses or film backs. A blind inside the camera covers the film prior to and after the exposure (but is not designed to be able to give accurately controlled exposure times) and a leaf shutter that is normally open is installed in the lens. To take a picture, the leaf shutter closes, the blind opens, the leaf shutter opens then closes again, and finally the blind closes and the leaf shutter re-opens (the last step may only occur when the shutter is re-cocked).

Using a focal-plane shutter, exposing the whole film plane can take much longer than the exposure time. The exposure time does not depend on the time taken to make the exposure over all, only on the difference between the time a specific point on the film is uncovered and then covered up again. For example an exposure of 1/1000 second may be achieved by the shutter curtains moving across the film plane in 1/50th of a second but with the two curtains only separated by 1/20th of the frame width. In fact in practice the curtains do not run at a constant speed as they would in an ideal design, obtaining an even exposure time depends mainly on being able to make the two curtains accelerate in a similar manner.

When photographing rapidly moving objects, the use of a focal-plane shutter can produce some unexpected effects, since the film closest to the start position of the curtains is exposed earlier than the film closest to the end position. Typically this can result in a moving object leaving a slanting image. The direction of the slant depends on the direction the shutter curtains run in (noting also that as in all cameras the image is inverted and reversed by the lens, i.e. "top-left" is at the bottom right of the sensor as seen by a photographer behind the camera).

Focal-plane shutters are also difficult to synchronise with flash bulbs and electronic flash and it is often only possible to use flash at shutter speeds where the curtain that opens to reveal the film completes its run and the film is fully uncovered, before the second curtain starts to travel and cover it up again. Typically 35mm film SLR's could sync flash at only up to 1/60th second if the camera has horizontal run cloth curtains, and 1/125th if using a vertical run metal shutter.

FILM FORMATS
A wide range of film and plate formats have been used by cameras. In the early history plate sizes were often specific for the make and model of camera although there quickly developed some standardisation for the more popular cameras. The introduction of roll film drove the standardisation process still further so that by the 1950s only a few standard roll films were in use. These included 120 film providing 8, 12 or 16 exposures, 220 film providing 16 or 24 exposures, 127 film providing 8 exposures (principally in Brownie cameras) and 35mm film providing 12, 20 or 36 exposures - or up to 72 exposures in bulk cassettes for the Leica Camera range.

For cine cameras, 35mm film was the original film format but 16mm film soon followed produced by cutting 35mm in two. An early amateur format was 9.5mm. Later formats included 8mm film and Super 8.

CAMERA ACCESSORIES

Accessories for cameras are mainly for care, protection, special effects and functions.
Lens hood: used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare.[12]
Lens cover: covers and protects the lens during storage
Lens adapter: sometimes called a step-ring, adapts the lens to other size filters
Lens extension tubes allow close focus in macro photography
Flash equipment: including light diffuser, mount and stand, reflector, soft box, trigger and cord
Care and protection: including camera case and cover, maintenance tools, and screen protector
Large format cameras use special equipment which includes magnifier loupe, view finder, angle finder, focusing rail /truck.
Battery and charger


CAMERA DESIGN

Plate camera

The earliest cameras produced in significant numbers used sensitised glass plates and are now termed plate cameras. Light entered a lens mounted on a lens board which was separated from the plate by an extendible bellows. Many of these cameras, had controls to raise or lower the lens and to tilt it forwards or backwards to control perspective . Focussing of these plate cameras was by the use of aground glass screen at the point of focus. Because lens design only allowed rather small aperture lenses, the image on the ground glass screen was faint and most photographers had a dark cloth to cover their heads to allow focussing and composition to be carried out more easily. When focus and composition were satisfactory, the ground glass screen was removed and a sensitised plate put in its place protected by a dark slide (photography) . To make the exposure, the dark slide was carefully slid out and the shutter opened and then closed and the dark-slide replaced. In current designs the plate camera is best represented by the view camera.


LARGE FORMAT


The large format camera is a direct successor of the early plate cameras and remain in use for high quality photography and for technical, architectural and industrial photography. There are three common types, the monorail camera, the field camera and the press camera. All use large format sheets of film, although there are backs for medium format 120-film available for most systems, and have an extensible bellows with the lens and shutter mounted on a lens plate at the front. These cameras have a wide range of movements allowing very close control of focus and perspective.

MEDIUM FORMAT


Medium-format cameras have a film size somewhere in between the large format cameras and the smaller 35mm cameras. Typically these systems use 120- or 220-film. The most common sizes being 6x4.5 cm, 6x6 cm and 6x7 cm. The designs of this kind of camera show greater variation than their larger brethren, ranging from monorail systems through the classic Hasselblad model with separate backs, to smaller rangefinder cameras. There are even compact amateur cameras available in this format.

FOLDING CAMERA


The introduction of films enabled the existing designs for plate cameras to be made much smaller and for the base-plate to be hinged so that it could be folded up compressing the bellows. These designs were very compact and small models were dubbed Vest pocket cameras.

BOX CAMERA


Box cameras were introduced as a budget level camera and had few if any controls. The original box Brownie models had a small reflex viewfinder mounted on the top of the camera and had no aperture or focusing controls and just a simple shutter. Later models such as the Brownie 127 had larger direct view optical viewfinders together with a curved film path to reduce the impact of deficiencies in the lens.

RANGE CAMERA


As camera and lens technology developed and wide aperture lenses became more common, range-finder cameras were introduced to make focussing more precise. The range finder has two separated viewfinder windows, one of which is linked to the focusing mechanisms and moved right or left as the focusing ring is turned. The two separate images are brought together on a ground glass viewing screen. When vertical lines in the object being photographed meet exactly in the combined image, the object is in focus. A normal composition viewfinder is also provided.

SINGLE-LENS FLEX

In the single-lens reflex camera the photographer sees the scene through the camera lens. This avoids the problem of parallax which occurs when the viewfinder or viewing lens is separated from the taking lens. Single-lens reflex cameras have been made in several formats including 220/120 taking 8, 12 or 16 photographs on a 120 roll and twice that number of a 220 film. These correspond to 6x9, 6x6 and 6x4.5 respectively (all dimensions in cm). Notable manufacturers of large format SLR include Hasselblad, Mamiya, Bronica and Pentax. However the most common format of SLRs has been 35 mm and subsequently the migration to digital SLRs, using almost identical sized bodies and sometimes using the same lens systems.

Almost all SLR used a front surfaced mirror in the optical path to direct the light from the lens via a viewing screen and pentaprism to the eyepiece. At the time of exposure the mirror flipped up out of the light path before the shutter opened. Some early cameras experimented other methods of providing through the lens viewing including the use of a semi transparent pellicle as in the Canon Pellix and others with a small periscope such as in the Corfield Periflex series

TWIN REFLEX

Twin-lens reflex cameras used a pair of nearly identical lenses, one to form the image and one as a viewfinder. The lenses were arranged with the viewing lens immediately above the taking lens. The viewing lens projects an image onto a viewing screen which can be seen from above. Some manufacturers such as Mamiya also provided a reflex head to attach to the viewing screen to allow the camera to be held to the eye when in use. The advantage of a TLR was that it could be easily focussed using the viewing screen and that under most circumstances the view seen in the viewing screen was identical to that recorded on film. At close distances however, parallax errors were encountered and some cameras also included an indicator to show what part of the composition would be excluded.

Some TLR had interchangeable lenses but as these had to be paired lenses they were relatively heavy and did not provide the range of focal lengths that the SLR could support. Although most TLRs used 120 or 220 film some used 127 film.

CINE CAMERA

ciné camera or movie camera takes a rapid sequence of photographs on strips of film. In contrast to a still camera, which captures a single snapshot at a time, the ciné camera takes a series of images, each called a "frame" through the use of an intermittent mechanism. The frames are later played back in a ciné projector at a specific speed, called the "frame rate" (number of frames per second). While viewing, a person's eyes and brain merge the separate pictures to create the illusion of motion. The first ciné camera was built around 1888 and by 1890 several types were being manufactured. The standard film size for ciné cameras was quickly established as 35mm film and this remains in use to this day. Other professional standard formats include 70 mm film and 16mm filmwhilst amateurs film makers used 9.5 mm film, 8mm film or Standard 8 and Super 8 before the move into digital format.

The size and complexity of ciné cameras varies greatly depending on the uses required of the camera. Some professional equipment is very large and too heavy to be hand held whilst some amateur cameras were designed to be very small and light for single-handed operation. In the last quarter of the 20th century camcorders supplanted film motion cameras for amateurs. Professional video camerasdid the same for professional users around the turn of the century.

Auteur Theory

In film criticism, the 1950s-era auteur theory holds that a director's films reflect that director's personal creative vision, as if he were the primary "auteur" (the French word for "author"). In spite of—and sometimes even because of—the films in question being made as part of an industrial process, the author's creative voice is distinctive enough to shine through all kinds of studio interference. In some cases, film producers are considered to have a similar "auteur" role for films that they have produced.

In law the auteur is the creator of a film as a work of art, and is the original copyright holder. Under European Union law the film director shall always be considered the author or one of the authors of a film.

Auteur theory has had a major impact on film criticism ever since it was advocated by film director and film critic François Truffaut in 1954. "Auteurism" is the method of analyzing films based on this theory or, alternately, the characteristics of a director's work that makes him or her an auteur. Both the auteur theory and the auteurism method of film analysis are frequently associated with the French New Wave and the film critics who wrote for the influential French film review periodical Cahiers du Cinéma.

HISTORY

Origin

Auteur theory draws on the work of a group of cinema enthusiasts who wrote for Cahiers du Cinéma and argued that films should reflect a director's personal vision. They championed filmmakers such asHoward Hawks, Alfred Hitchcock, and Jean Renoir as absolute 'auteurs' of their films. Although André Bazin, co-founder of the Cahiers, provided a forum for Auteurism to flourish, he himself remained wary of its excesses, as he explained in his article "On the Auteur Theory" (Cahier # 70, 1957). Another key element of Auteur theory comes from Alexandre Astruc's notion of the caméra-stylo or "camera-pen" and the idea that directors should wield their cameras like writers use their pens and that they need not be hindered by traditional storytelling.

Truffaut and the members of the Cahiers recognized that moviemaking was an industrial process. However, they proposed an ideal to strive for: the director should use the commercial apparatus the way a writer uses a pen and, through the mise en scène, imprint their vision on the work (conversely, the role of the screenwriter was minimized in their eyes). While recognizing that not all directors reached this ideal, they valued the work of those who neared it.

Truffaut's development

In his 1954 essay "Une certaine tendance du cinéma français" ("A certain tendency in French cinema"), François Truffaut coined the phrase "la politique des Auteurs", and asserted that the worst of Jean Renoir's movies would always be more interesting than the best of Jean Delannoy's. "Politique" might very well be translated as "policy" or "program"; it involves a conscious decision to look at films and to value them in a certain way. Truffaut provocatively said that "(t)here are no good and bad movies, only good and bad directors".

Truffaut's article dealt primarily by his own admission with scenarists or screenwriters. Precisely the screenwriting duo Jean Aurenche and Pierre Bost whom Truffaut believed simplified and compromised many of the great works of French literature in order to support the political topic of its day. In his article, he quotes the director Claude Autant-Lara describing his adaptation of Raymond Radiguet's Devil in the Flesh as an "anti-war" book when the book pre-dated the Second World War. The term auteur described by Truffaut is applied to directors like Jean Renoir, Max Ophuls, Jacques Becker, Jacques Tati, and Robert Bresson, who aside from having a distinct style also wrote the screenplays or worked on the screenplays of the film as well.

The auteur theory in its embryonic form dealt with the nature of literary adaptations and Truffaut's discomfort with the screenwriters Aurenche's and Bost's maxim that any film adaptation of a novel should capture its spirit and deal only with the "filmable" aspects of the books. Truffaut believed that film directors like Robert Bresson using the film narrative at its disposal could approach even the so-called "unfilmable" scenes, for which he used the film version of Georges Bernanos's Diary of a Country Priest as an example.

Much of Truffaut's writing of this period, and of his colleagues at the film criticism magazine Cahiers du cinéma, was designed to lambaste post-war French cinema, and especially the big production films of the cinéma de qualité ("quality films"). Truffaut's circle referred to these films with disdain as sterile, old-fashioned cinéma de papa (or "Dad's cinema"). During the Nazi occupation, the Vichygovernment did not allow the exhibition of U.S. films such as The Maltese Falcon and Citizen Kane. When French film critics were finally able to see these 1940s U.S. movies in 1946, they were enamoured with these films.

Truffaut's theory maintains that all good directors (and many bad ones) have such a distinctive style or consistent theme that their influence is unmistakable in the body of their work. Truffaut himself was appreciative of both directors with a marked visual style (such as Alfred Hitchcock), and those whose visual style was less pronounced but who had nevertheless a consistent theme throughout their movies (such as Jean Renoir's humanism).

IMPACT

The auteur theory was used by the directors of the nouvelle vague (New Wave) movement of French cinema in the 1960s (many of whom were also critics at the Cahiers du Cinéma) as justification for their intensely personal and idiosyncratic films. One of the ironies of the Auteur theory is that, at the very moment Truffaut was writing, the break-up of the Hollywood studio system during the 1950s was ushering in a period of uncertainty and conservatism in American cinema, with the result that fewer of the sort of films Truffaut admired were actually being made.

The "auteur" approach was adopted in English-language film criticism in the 1960s. In the UK, Movie adopted Auteurism, while in the U.S., Andrew Sarris introduced it in the essay, "Notes on the Auteur Theory in 1962". This essay is where the term, "Auteur theory", originated. To be classified as an "auteur", according to Sarris, a director must accomplish technical competence in their technique, personal style in terms of how the movie looks and feels, and interior meaning (although many of Sarris's auterist criteria were left vague[citation needed]). Later in the decade, Sarris published The American Cinema: Directors and Directions, 1929–1968, which quickly became the unofficial bible of auteurism.

The auteurist critics—Truffaut, Jean-Luc Godard, Claude Chabrol, Éric Rohmer—wrote mostly about directors (as they were directors themselves), although they also produced some shrewd appreciations of actors. Later writers of the same general school have emphasised the contributions of star personalities like Mae West. However, the stress was on directors; and screenwriters, producers and others have reacted with a good deal of hostility. Writer William Goldman has said that, on first hearing the Auteur theory, his reaction was, "What's the punchline?"


CRITICISM

Starting in the 1960s, some film critics began criticising auteur theory's focus on the authorial role of the director. Pauline Kael and Sarris feuded in the pages of The New Yorker and various film magazines. One reason for the backlash is the collaborative aspect of shooting a film, and in the theory's privileging of the role of the director (whose name, at times, has become more important than the movie itself). In Kael's review of Citizen Kane, a classic film for the auteur model, she points out how the film made extensive use of the distinctive talents of co-writer Herman J. Mankiewicz and cinematographer Gregg Toland.

Notable screenwriters such as Ernest Lehman, Nicholas Kazan, Robert Riskin and William Goldman have publicly balked at the idea that directors are more authorial than screenwriters, while film historian Aljean Harmetz, referring to the creative input of producers and studio executives in classical Hollywood, argues that the auteur theory "collapses against the reality of the studio system".

The auteur theory was also challenged by the influence of New Criticism, a school of literary criticism. The New Critics argued that critics made an "intentional fallacy" when they tried to interpret works of art by speculating about what the author meant, based on the author's personality or life experiences. New Critics argued that that information or speculation about an author's intention was secondary to the words on the page as the basis of the experience of reading literature.

In 2006, David Kippen coined the term Schreiber theory to refer to the theory of the screenwriter as the principal author of a film.

LIST OF AUTEURS

The term auteur (French for author) is used to describe film directors (or, more rarely, producers, or writers) who are considered to have a distinctive, recognizable style, because they 

(a) repeatedly return to the same subject matter, 

(b) habitually address a particular psychological or moral theme, 

(c) employ a recurring visual and aesthetic style, or 

(d) demonstrate any combination of the above. In theory, an auteur's films are identifiable regardless of their genre. The term was first applied in its cinematic sense in François Truffaut's 1954 essay "A Certain Tendency of the French Cinema"

Apparatus Theory

Apparatus theory, derived in part from Marxist film theory, semiotics, and psychoanalysis, was a dominant theory within cinema studies during the 1970s. It maintains that cinema is by nature ideologicalbecause its mechanics of representation are ideological. Its mechanics of representation include the camera and editing. The central position of the spectator within the perspective of the composition is also ideological.

Apparatus theory also argues that cinema maintains the dominant ideology of the culture within the viewer. Ideology is not imposed on cinema, but is part of its nature.

Apparatus theory follows an institutional model of spectatorship.

Philosophy of Film

The philosophy of film is a branch of aesthetics within the discipline of philosophy that seeks to understand the most basic questions regarding film.

The earliest person to explore philosophical questions regarding film was Hugo Münsterberg. During the silent film era, he sought to understand what it was about film that made it conceptually distinct from theater. He concluded that the use of close-ups, flash-backs, and edits were unique to film and constituted its nature.

Rudolf Arnheim, with the beginning of the era of sound for film, argued that the silent film era was aesthetically superior to the "talkies". He held that by adding sound to previously silent moving images, the unique status of film had been removed. Instead of being a unique art form that could carefully study bodies in motion, film had become merely a combination of two other art forms.

André Bazin, contrary to Arnheim, held that whether or not a film has sound is largely irrelevant. He believed that film, due mainly to its foundation in and relationship with photography, had a realist aspect to it. He argued that film has the ability to capture the real world. The film Waking Life also features a discussion of the philosophy of film where the theories of Bazin are emphasized. In it, the character waxes philosophic that every moment of film is capturing an aspect of God.

American philosopher Noël Carroll has argued that the earlier characterizations of film made by philosophers too narrowly defined the nature of film and that the incorrectly conflated aspects of genres of films with film in general.

Aspects of Bazin's realist theories have been accepted by philosophers in spite of Carroll's critique. The transparency thesis, which says that film is a medium transparent to true reality, has been accepted by Kendall Walton.

Film Theory

Film theory is an academic discipline, closely allied with critical theory, that aims to explore the essence of the cinema and provides conceptual frameworks for understanding film's relationship to reality, the other arts, individual viewers, and society at large. Film theory is not to be confused with general film criticism, though there can be some crossover between the two disciplines.

In some respects, French philosopher Henri Bergson's Matter and Memory anticipated the development of film theory at a time that the cinema was just being born as a new medium—the early 1900s. He commented on the need for new ways of thinking about movement, and coined the terms "the movement-image" and "the time-image". However, in his 1906 essay L'illusion cinématographique (inL'évolution créatrice), he rejects film as an exemplification of what he had in mind. Nonetheless, decades later, in Cinéma I and Cinema II (1983-1985), the philosopher Gilles Deleuze took Matter and Memory as the basis of his philosophy of film and revisited Bergson's concepts, combining them with the semiotics of Charles Sanders Peirce.

Early film theory arose in the silent era and was mostly concerned with defining the crucial elements of the medium. It largely evolved from the works of directors like Germaine Dulac, Louis Delluc, Jean Epstein, Sergei Eisenstein, Lev Kuleshov, and Dziga Vertov and film theorists like Rudolf Arnheim, Béla Balázs and Siegfried Kracauer. These individuals emphasized how film differed from reality and how it might be considered a valid art form.

In the years after World War II, the French film critic and theorist André Bazin reacted against this approach to the cinema, arguing that film's essence lay in its ability to mechanically reproduce reality, not in its difference from reality.

In the 1960s and 1970s, film theory took up residence in academe, importing concepts from established disciplines like psychoanalysis, gender studies, anthropology, literary theory, semiotics andlinguistics.

During the 1990s the digital revolution in image technologies has had an impact on film theory in various ways. There has been a refocus onto celluloid film's ability to capture an indexical image of a moment in time by theorists like Mary Ann Doane, Philip Rosen and Laura Mulvey who was informed by psychoanalysis. From a psychoanalytical perspective, after the Lacanian notion of the Real, Slavoj Žižek offered new aspects of the gaze extensively used in contemporary film analysis.[3] There has also been a historical revisiting of early cinema screenings, practices and spectatorship modes by writers Tom Gunning, Miriam Hansen and Yuri Tsivian.

This is the link where you can download all the books :

http://www.scribd.com/doc/37145451/Concepts-in-Film-Theory
http://www.scribd.com/doc/1250569/Film-Theory