1.
Photography
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Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure. With an electronic sensor, this produces an electrical charge at each pixel. A negative image on film is used to photographically create a positive image on a paper base, known as a print. The word photography was created from the Greek roots φωτός, genitive of φῶς, light and γραφή representation by means of lines or drawing, several people may have coined the same new term from these roots independently. Johann von Maedler, a Berlin astronomer, is credited in a 1932 German history of photography as having used it in an article published on 25 February 1839 in the German newspaper Vossische Zeitung. Both of these claims are now widely reported but apparently neither has ever been confirmed as beyond reasonable doubt. Credit has traditionally given to Sir John Herschel both for coining the word and for introducing it to the public. Photography is the result of combining several technical discoveries, later Greek mathematicians Aristotle and Euclid also independently described a pinhole camera in the 5th and 4th centuries BCE. Daniele Barbaro described a diaphragm in 1566, wilhelm Homberg described how light darkened some chemicals in 1694. The fiction book Giphantie, published in 1760, by French author Tiphaigne de la Roche, the discovery of the camera obscura that provides an image of a scene dates back to ancient China. Leonardo da Vinci mentions natural camera obscura that are formed by dark caves on the edge of a sunlit valley, a hole in the cave wall will act as a pinhole camera and project a laterally reversed, upside down image on a piece of paper. So the birth of photography was primarily concerned with inventing means to capture, renaissance painters used the camera obscura which, in fact, gives the optical rendering in color that dominates Western Art. The camera obscura literally means dark chamber in Latin and it is a box with a hole in it which allows light to go through and create an image onto the piece of paper. Around the year 1800, British inventor Thomas Wedgwood made the first known attempt to capture the image in a camera obscura by means of a light-sensitive substance and he used paper or white leather treated with silver nitrate. The shadow images eventually darkened all over, the first permanent photoetching was an image produced in 1822 by the French inventor Nicéphore Niépce, but it was destroyed in a later attempt to make prints from it. Niépce was successful again in 1825, in 1826 or 1827, he made the View from the Window at Le Gras, the earliest surviving photograph from nature. Because Niépces camera photographs required a long exposure, he sought to greatly improve his bitumen process or replace it with one that was more practical. With an eye to eventual commercial exploitation, the partners opted for total secrecy, Daguerres efforts culminated in what would later be named the daguerreotype process
2.
Kodak
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Eastman Kodak Company, commonly referred to as Kodak, is an American technology company that produces imaging products with its historic basis on photography. The company is headquartered in Rochester, New York and is incorporated in New Jersey, Kodak provides packaging, functional printing, graphic communications and professional services for businesses around the world. Its main business segments are Print Systems, Enterprise Inkjet Systems, Micro 3D Printing and Packaging, Software and Solutions and it is best known for photographic film products. Kodak was founded by George Eastman and Henry A, during most of the 20th century, Kodak held a dominant position in photographic film. The companys ubiquity was such that its Kodak moment tagline entered the lexicon to describe a personal event that was demanded to be recorded for posterity. Kodak began to struggle financially in the late 1990s, as a result of the decline in sales of photographic film, as a part of a turnaround strategy, Kodak began to focus on digital photography and digital printing, and attempted to generate revenues through aggressive patent litigation. In January 2012, Kodak filed for Chapter 11 bankruptcy protection in the United States District Court for the Southern District of New York. In February 2012, Kodak announced that it would stop making digital cameras, pocket video cameras and digital picture frames, in January 2013, the Court approved financing for Kodak to emerge from bankruptcy by mid 2013. Kodak sold many of its patents for approximately $525,000,000 to a group of companies under the names Intellectual Ventures, on September 3,2013, the company emerged from bankruptcy having shed its large legacy liabilities and exited several businesses. Personalized Imaging and Document Imaging are now part of Kodak Alaris, on March 12,2014, it announced that the board of directors elected Jeffrey J. Clarke as chief executive officer and a member of its board of directors. As late as 1976, Kodak commanded 90% of film sales, Japanese competitor Fujifilm entered the U. S. market with lower-priced film and supplies, but Kodak did not believe that American consumers would ever desert its brand. Kodak passed on the opportunity to become the film of the 1984 Los Angeles Olympics, Fuji won these sponsorship rights. Fuji opened a plant in the U. S. and its aggressive marketing. Fuji went from a 10% share in the early 1990s to 17% in 1997, fujis films soon also found a competitive edge in higher-speed negative films, with a tighter grain structure. The complaint was lodged by the United States with the World Trade Organization, on January 30,1998, the WTO announced a sweeping rejection of Kodaks complaints about the film market in Japan. Although Kodak developed a camera in 1975, the first of its kind. In the 1990s, Kodak planned a journey to move to digital technology. CEO George M. C. Fisher reached out to Microsoft, Apples pioneering QuickTake consumer digital cameras, introduced in 1994, had the Apple label but were produced by Kodak
3.
Bath, Somerset
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Bath is a city in the ceremonial county of Somerset, England, known for its Roman-built baths. In 2011, the population was 88,859, Bath is in the valley of the River Avon,97 miles west of London and 11 miles south-east of Bristol. The city became a World Heritage Site in 1987, the city became a spa with the Latin name Aquæ Sulis c. AD60 when the Romans built baths and a temple in the valley of the River Avon, Bath Abbey was founded in the 7th century and became a religious centre, the building was rebuilt in the 12th and 16th centuries. In the 17th century, claims were made for the properties of water from the springs. Many of the streets and squares were laid out by John Wood, the Elder, and in the 18th century the city became fashionable, Jane Austen lived in Bath in the early 19th century. Further building was undertaken in the 19th century and following the Bath Blitz in World War II, the city has software, publishing and service-oriented industries. Theatres, museums, and other cultural and sporting venues have helped make it a centre for tourism with more than one million staying visitors and 3.8 million day visitors to the city each year. There are several museums including the Museum of Bath Architecture, Victoria Art Gallery, Museum of East Asian Art, the city has two universities, the University of Bath and Bath Spa University, with Bath College providing further education. Sporting clubs include Bath Rugby and Bath City F. C. while TeamBath is the name for all of the University of Bath sports teams. Bath became part of the county of Avon in 1974, and, the hills in the locality such as Bathampton Down saw human activity from the Mesolithic period. Several Bronze Age round barrows were opened by John Skinner in the 18th century, solsbury Hill overlooking the current city was an Iron Age hill fort, and the adjacent Bathampton Camp may also have been one. A long barrow site believed to be from the Beaker people was flattened to make way for RAF Charmy Down, messages to her scratched onto metal, known as curse tablets, have been recovered from the sacred spring by archaeologists. The tablets were written in Latin, and cursed people whom the writers felt had wronged them, for example, if a citizen had his clothes stolen at the baths, he might write a curse, naming the suspects, on a tablet to be read by the goddess. A temple was constructed in AD 60–70, and a complex was built up over the next 300 years. Engineers drove oak piles into the mud to provide a stable foundation, in the 2nd century, the spring was enclosed within a wooden barrel-vaulted structure that housed the caldarium, tepidarium, and frigidarium. The town was given defensive walls, probably in the 3rd century. After the failure of Roman authority in the first decade of the 5th century, in March 2012 a hoard of 30,000 silver Roman coins, one of the largest discovered in Britain, was unearthed in an archaeological dig
4.
Light meter
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A light meter is a device used to measure the amount of light. In photography, a meter is often used to determine the proper exposure for a photograph. Light meters are used in the fields of cinematography and scenic design. They are used in the field of lighting, where they can help to reduce the amount of waste light used in the home, light pollution outdoors. The earliest type of light meters were called extinction meters and contained a numbered or lettered row of neutral density filters of increasing density. The photographer would position the meter in front of his subject, the letter or number corresponding to the filter was used as an index into a chart of appropriate aperture and shutter speed combinations for a given film speed. Extinction meters suffered from the problem that they depended on the sensitivity of the human eye. Later meters removed the element and relied on technologies incorporating selenium, CdS. Selenium and silicon light meters use sensors that are photovoltaic, they generate a proportional to light exposure. Selenium sensors generate enough voltage for direct connection to a meter, they need no battery to operate, selenium sensors however cannot measure low light accurately and are altogether unable to measure very low light, such as candlelight, moonlight, starlight etc. Silicon sensors need an amplification circuit and require a source such as batteries to operate. CdS light meters use a sensor based on photoresistance, i. e. their electrical resistance changes proportionately to light exposure and these also require a battery to operate. Most modern light meters use silicon or CdS sensors and they indicate the exposure either with a needle galvanometer or on an LCD screen. Many modern consumer still and video include a built-in meter that measures a scene-wide light level and are able to make an approximate measure of appropriate exposure based on that. There are two types of light meters, reflected-light and incident-light. Reflected-light meters measure the light reflected by the scene to be photographed, all in-camera meters are reflected-light meters. Reflected-light meters are calibrated to show the appropriate exposure for “average” scenes and this pitfall is avoided by incident-light meters which measure the amount of light falling on the subject using an integrating sphere placed on top of the light sensor. Because the incident-light reading is independent of the reflectance, it is less likely to lead to incorrect exposures for subjects with unusual average reflectance
5.
Film speed
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Film speed is the measure of a photographic films sensitivity to light, determined by sensitometry and measured on various numerical scales, the most recent being the ISO system. A closely related ISO system is used to measure the sensitivity of digital imaging systems, highly sensitive films are correspondingly termed fast films. In both digital and film photography, the reduction of exposure corresponding to use of higher sensitivities generally leads to reduced image quality, in short, the higher the sensitivity, the grainier the image will be. Ultimately sensitivity is limited by the efficiency of the film or sensor. The speed of the emulsion was then expressed in degrees Warnerke corresponding with the last number visible on the plate after development. Each number represented an increase of 1/3 in speed, typical speeds were between 10° and 25° Warnerke at the time. The concept, however, was built upon in 1900 by Henry Chapman Jones in the development of his plate tester. In their system, speed numbers were inversely proportional to the exposure required, for example, an emulsion rated at 250 H&D would require ten times the exposure of an emulsion rated at 2500 H&D. The methods to determine the sensitivity were later modified in 1925, the H&D system was officially accepted as a standard in the former Soviet Union from 1928 until September 1951, when it was superseded by GOST 2817-50. The Scheinergrade system was devised by the German astronomer Julius Scheiner in 1894 originally as a method of comparing the speeds of plates used for astronomical photography, Scheiners system rated the speed of a plate by the least exposure to produce a visible darkening upon development. ≈2 The system was extended to cover larger ranges and some of its practical shortcomings were addressed by the Austrian scientist Josef Maria Eder. Scheiners system was abandoned in Germany, when the standardized DIN system was introduced in 1934. In various forms, it continued to be in use in other countries for some time. The DIN system, officially DIN standard 4512 by Deutsches Institut für Normung, was published in January 1934, International Congress of Photography held in Dresden from August 3 to 8,1931. The DIN system was inspired by Scheiners system, but the sensitivities were represented as the base 10 logarithm of the sensitivity multiplied by 10, similar to decibels. Thus an increase of 20° represented an increase in sensitivity. ≈3 /10 As in the Scheiner system, speeds were expressed in degrees, originally the sensitivity was written as a fraction with tenths, where the resultant value 1.8 represented the relative base 10 logarithm of the speed. Tenths were later abandoned with DIN4512, 1957-11, and the example above would be written as 18° DIN, the degree symbol was finally dropped with DIN4512, 1961-10
6.
110 film
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110 is a cartridge-based film format used in still photography. It was introduced by Kodak in 1972,110 is essentially a miniaturised version of Kodaks earlier 126 film format. Each frame is 13 mm ×17 mm, with one registration hole, the film is fully housed in a plastic cartridge, which also registers the image when the film is advanced. There is a backing paper, and the frame number. The film does not need to be rewound and is simple to load and unload. It is pre-exposed with frame lines and numbers, a feature intended to make it easier, unlike later competing formats, such as disc and APS film, processed 110 negatives were returned in strips, without the original cartridge. The 110 cartridge was introduced by Kodak in 1972 with Kodak Pocket Instamatic cameras, the new pocket-sized cameras became immediately popular, and soon displaced competing subminiature cameras, such as the Minolta 16 series, from the market. The 110 film width is 16 mm, a four frame strip measures 111 mm. Fujifilm stopped manufacturing 110 in September 2009. Lomography re-commenced 110 film production in 2011, Lomography sell 110 Black and White, Colour negative, and Colour slide film. Such cameras are capable of making high-quality images on 110 film, some of these cameras are quite small and still hold appeal to subminiature-photography enthusiasts. The small negative size of 110 film makes it difficult to enlarge successfully, for these reasons, the 110 format is associated with prints that are often rather grainy and unsharp. This has led to the misconception that the cartridge itself is incapable of holding film flat enough for making high-quality negatives, the 110 cartridge, as specified by Kodak, has a plastic tab on one end. Camera designers had the option of using this tab to sense film speed, a short tab indicated high-speed film, and a long tab indicated low-speed film. Kodak left it to the manufacturer to decide which film speeds were high or low. Only a few took advantage of this feature, Rollei A110, Canon 110 ED, Minolta 110 Zoom SLR Mark I/II, Minox 110S. The last 110 film that Kodak produced was ISO400 speed packed in a cartridge that senses as low speed, as shown in the photograph to the right, these cartridges can be modified by hand so that they signal the proper speed to the camera. Although the format is associated with print film, Kodak also produced Kodachrome 110 slide film until 1982. In 2012 Lomography re-introduced slide film for 110 with their Peacock 200 ASA model, however, since not all 110 cameras have a settable ASA dial, a ND filter has to be used over the lens or the exposure compensation dial has to be used where available
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