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Photographic Enlarger
An enlarger is a specialized transparency projector used to produce photographic prints from film or glass negatives, or from transparencies. Construction All enlargers consist of a light source, normally an incandescent light bulb shining though a condenser or translucent screen to provide even illumination, a holder for the negative or transparency, and a specialized lens for projection. The light passes through a film holder, which holds the exposed and developed photographic negative or transparency. Prints made with an enlarger are called ''enlargements''. Typically, enlargers are used in a darkroom, an enclosed space from which extraneous light may be excluded; some commercial enlargers have an integral dark box so that they can be used in a light-filled room. History Josef Maria Eder, in his ''History of Photography'' attributes the invention of photographic enlargement to Humphry Davy who realised the idea of using a solar microscope to project images onto sensitise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Darkroom Enlarger En
A darkroom is used to process photographic film, to make prints and to carry out other associated tasks. It is a room that can be made completely dark to allow the processing of the light-sensitive photographic materials, including film and photographic paper. Various equipment is used in the darkroom, including an enlarger, baths containing chemicals, and running water. Darkrooms have been used since the inception of photography in the early 19th century. Darkrooms have many various manifestations, from the elaborate space used by Ansel Adams to a retooled ambulance wagon used by Timothy H. O'Sullivan. From the initial development of the film to the creation of prints, the darkroom process allows complete control over the medium. Due to the popularity of color photography and complexity of processing color film (''see C-41 process'') and printing color photographs and also to the rise, first of instant photography technology and later digital photography, darkrooms are decrea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Johnson (inventor)
John Johnson (May 28, 1813 – May 3, 1871) was a watchmaker mechanic technician, manufacturer of dental instruments, experimental photographer and inventor. With a business partner, Alexander S. Wolcott, he made the first patented camera that took photographs and started the world's first commercial portrait studio. Johnson developed portrait studio franchises throughout England and sold photography license rights. A Wolcott-Johnson's portrait camera made in 1840 was discovered in 1976 at the Saco Museum in Maine where Johnson had deposited it when he was its first curator. Early life Johnson was born in Saco, Maine, on May 28, 1813. His father was William Short Johnson. Johnson lived his childhood and got his initial schooling in Pembroke, New Hampshire. The first job he obtained was in 1832, as an assistant to a New York City watchmaker. In 1837 he formed a business with Alexander S. Wolcott on 52nd Street, making dental instruments. Mid life and career On October 6, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Benjamin Dancer
John Benjamin Dancer (8 October 1812 – 24 November 1887) was a British scientific instrument maker and inventor of microphotography. He also pioneered stereography. Life By 1835, he controlled his father's instrument making business in Liverpool. He was responsible for various inventions, but did not patent many of his ideas. In 1856, he invented the stereoscopic camera (GB patent 2064/1856). He died at the age of 75 and was buried at Brooklands Cemetery, Sale, Greater Manchester. Dancer improved the Daniell cell by introducing the porous pot cell, which he invented in 1838. He was a leading inventor and practitioner in the emerging field of microphotography, work he began shortly after the Daguerreotype process was first announced in 1839. His novel uses of microphotography, such as "the reduction of the 680-word tablet erected in memory of the electrician William Sturgeon to a positive one-sixteenth of an inch in diameter", attracted much public attention. Dancer was re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limelight
Limelight (also known as Drummond light or calcium light)James R. Smith (2004). ''San Francisco's Lost Landmarks'', Quill Driver Books. is a type of stage lighting once used in theatres and music halls. An intense illumination is created when a flame fed by oxygen and hydrogen is directed at a cylinder of quicklime (calcium oxide), which can be heated to before melting. The light is produced by a combination of incandescence and candoluminescence. Although it has long since been replaced by electric lighting, the term has nonetheless survived, as someone in the public eye is still said to be "in the limelight". The actual lamps are called "limes", a term which has been transferred to electrical equivalents. History Discovery and invention The limelight effect was discovered in the 1820s by Goldsworthy Gurney, based on his work with the "oxy-hydrogen blowpipe", credit for which is normally given to Robert Hare. In 1825, a Scottish engineer, Thomas Drummond (1797–1840), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
King's Road
King's Road or Kings Road (or sometimes the King's Road, especially when it was the king's private road until 1830, or as a colloquialism by middle/upper class London residents), is a major street stretching through Chelsea, London, Chelsea and Fulham, both in west London. It is associated with 1960s in fashion, 1960s style and with fashion figures such as Mary Quant and Vivienne Westwood. Sir Oswald Mosley's British Union of Fascists, Blackshirt movement had a barracks on the street in the 1930s. Location King's Road runs for just under through Chelsea, in the Royal Borough of Kensington & Chelsea, from Sloane Square in the east (on the border with Belgravia and Knightsbridge) and through the Chelsea Design Quarter (Moore Park Estate) on the border of Chelsea and Fulham. Shortly after crossing Stanley Bridge the road passes a slight kink at the junction with Waterford Road, where it then becomes New King's Road, continuing to Fulham High Street and Putney Bridge; its wester ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carte De Visite
The ''carte de visite'' (, visiting card), abbreviated CdV, was a type of small photograph which was patented in Paris by photographer André Adolphe Eugène Disdéri in 1854, although first used by Louis Dodero. Each photograph was the size of a visiting card, and such photograph cards were commonly traded among friends and visitors in the 1860s. Albums for the collection and display of cards became a common fixture in Victorian parlors. The immense popularity of these card photographs led to the publication and collection of photographs of prominent persons. History and format The ''carte de visite'' was usually made of an albumen print, which was a thin paper photograph mounted on a thicker paper card. The size of a ''carte de visite'' is × mounted on a card sized × . In 1854, Disdéri had also patented a method of taking eight separate negatives on a single plate, which reduced production costs. The ''carte de visite'' was slow to gain widespread use until 1859, when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Désiré Van Monckhoven
Désiré Charles Emanuel van Monckhoven (1834–1882) was a Belgian chemist, physicist, and photographic researcher. He was also an inventor and author.Day, Lance ''et al.'' (1996) ''Biographical Dictionary of the History of Technology,'' p. 495./ref> Works He wrote several of the earliest books on photography and photographic optics. His original French works were later translated to English and other languages. He invented or developed an enlarger (1864),Hannavy, John. (2008) ''Encyclopedia of Nineteenth-century Photography,'' p. 1438./ref> a dry collodion process (1871), improvements of the carbon print process (1875–80), and improved silver-bromide gelatine emulsions. T3- d126 - Fig. 78. — Appareil d’agrandissement de M. Monckhoven.png, Enlarger T3- d127 - Fig. 79. — Effet de l’appareil de M. Monckhoven.png Selected work * 1857 – ''Méthodes simplifiées de photographie sur papier'' (Simplified methods of photography on paper). Paris : Marion. * 1858 – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heliostat
A heliostat (from ''helios'', the Greek word for ''sun'', and ''stat'', as in stationary) is a device that includes a mirror, usually a plane mirror, which turns so as to keep reflecting sunlight toward a predetermined target, compensating for the sun's apparent motions in the sky. The target may be a physical object, distant from the heliostat, or a direction in space. To do this, the reflective surface of the mirror is kept perpendicular to the bisector of the angle between the directions of the sun and the target as seen from the mirror. In almost every case, the target is stationary relative to the heliostat, so the light is reflected in a fixed direction. According to contemporary sources the heliostata, as it was called at first, was invented by Willem 's Gravesande (1688–1742). Other contenders are Giovanni Alfonso Borelli (1608–1679) and Daniel Gabriel Fahrenheit (1686–1736). A Heliostat designed by George Johnstone Storey is in the Science Museum Group collec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Projector
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen. The most common type of projector used today is called a video projector. Video projectors are digital replacements for earlier types of projectors such as slide projectors and overhead projectors. These earlier types of projectors were mostly replaced with digital video projectors throughout the 1990s and early 2000s, but old analog projectors are still used at some places. The newest types of projectors are handheld projectors that use lasers or LEDs to project images. Movie theaters used a type of projector called a m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Camera
The solar camera, or solar enlarger, is an ancestor of the darkroom enlarger, and was used in the mid-to-late 19th century to make photographic enlargements from negatives. Other uses The name ''Solar'' was registered as the brand of an unrelated electrically-illuminated darkroom enlarger marketed post-WW2 in the United States by Burke & James Inc., Chicago. Description Early photographic materials were less light sensitive, and prints were made by simple superposition ("Contact prints"). The solar camera enlarger permitted photographers to make enlargements from glass negatives. However, exposures required for making such copies from negatives increase inversely with enlargement area. Photographers therefore employed the most powerful light source then available: the Sun. Solar cameras were at first freestanding, a design based on picture-taking cameras but with the relative position of negative and lens reversed so that sunlight shone through the glass plate to be project ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Collodion Process
The collodion process is an early photographic process. The collodion process, mostly synonymous with the "collodion wet plate process", requires the photographic material to be coated, sensitized, exposed, and developed within the span of about fifteen minutes, necessitating a portable darkroom for use in the field. Collodion is normally used in its wet form, but it can also be used in dry form, at the cost of greatly increased exposure time. The increased exposure time made the dry form unsuitable for the usual portraiture work of most professional photographers of the 19th century. The use of the dry form was therefore mostly confined to landscape photography and other special applications where minutes-long exposure times were tolerable. History Gustave Le Gray first theorized about the collodion process, publishing a method in 1850 that was "theoretical at best", but Frederick Scott Archer was credited with the invention of the process, which he created in 1848 and publis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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