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| The Grandma in La Maternitat Gardens, Les Corts |
Today, Claire Fontaine and The Grandma have gone to an exposition about Antoni Gallargo Garriga, Frederic Juandó Alegret & Emili Juncadella Vidal-Ribas, three great Catalan photographers of the last century. The exposition is sited in La Maternitat Gardens, a beautiful place next to the Camp Nou, in Les Corts, Barcelona.
Claire Fontaine loves photography and it has been a good chance to discover how was Barcelona in the beginning of the last century, how its citizens were, how they lived and which kind of leisure they had.
Before going to La Maternitat Gardens, The Grandma has studied her Ms. Excel course.
Chapter 8. Changes of Structure (Spanish Version)
Photography is the art, application and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
It is employed in many fields of science, manufacturing, and business, as well as its more direct uses for art, film and video production, recreational purposes, hobby, and mass communication.
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 image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a digital image file for subsequent display or processing. The result with photographic emulsion is an invisible latent image, which is later chemically developed into a visible image, either negative or positive depending on the purpose of the photographic material and the method of processing.
More information: Photo Museum
A negative image on film is traditionally used to photographically create a positive image on a paper base, known as a print, either by using an enlarger or by contact printing.
The word photography was created from the Greek roots φωτός (phōtos), genitive of φῶς (phōs), light and γραφή (graphé) representation by means of lines or drawing, together meaning drawing with light.
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| A. Gallargo, F. Juandó & E. Juncadella |
Several people may have coined the same new term from these roots independently. Hercules Florence, a French painter and inventor living in Campinas, Brazil, used the French form of the word, photographie, in private notes which a Brazilian historian believes were written in 1834.
This claim is widely reported but is not yet largely recognized internationally. The first use of the word by the Franco-Brazilian inventor became widely known after the research of Boris Kossoy in 1980. The German newspaper Vossische Zeitung of 25 February 1839 contained an article entitled Photographie, discussing several priority claims -especially Henry Fox Talbot's- regarding Daguerre's claim of invention. The article is the earliest known occurrence of the word in public print. It was signed J.M., believed to have been Berlin astronomer Johann von Maedler. The astronomer Sir John Herschel is also credited with coining the word, independent of Talbot, in 1839.
This claim is widely reported but is not yet largely recognized internationally. The first use of the word by the Franco-Brazilian inventor became widely known after the research of Boris Kossoy in 1980. The German newspaper Vossische Zeitung of 25 February 1839 contained an article entitled Photographie, discussing several priority claims -especially Henry Fox Talbot's- regarding Daguerre's claim of invention. The article is the earliest known occurrence of the word in public print. It was signed J.M., believed to have been Berlin astronomer Johann von Maedler. The astronomer Sir John Herschel is also credited with coining the word, independent of Talbot, in 1839.
The inventors Nicéphore Niépce, Henry Fox Talbot and Louis Daguerre seem not to have known or used the word photography, but referred to their processes as Heliography (Niépce), Photogenic Drawing/Talbotype/Calotype (Talbot) and Daguerreotype (Daguerre).
Photography is the result of combining several technical discoveries, relating to seeing an image and capturing the image.
More information: Light Stalking
The discovery of the camera obscura, dark chamber in Latin, that provides an image of a scene dates back to ancient China. Greek mathematicians Aristotle and Euclid independently described a pinhole camera in the 5th and 4th centuries BCE.
In the 6th century CE, Byzantine mathematician Anthemius of Tralles used a type of camera obscura in his experiments. The Arab physicist Ibn al-Haytham (Alhazen) (965–1040) also invented a camera obscura and pinhole camera.
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.
Renaissance painters used the camera obscura
which, in fact, gives the optical rendering in color that dominates
Western Art. It is a box with a hole in it which allows light to go
through and create an image onto the piece of paper.
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| Futbol Club Barcelona & Espanyol de Barcelona |
The birth of photography was then concerned with inventing means to capture and keep the image produced by the camera obscura.
Albertus Magnus (1193–1280) discovered silver nitrate, and Georg Fabricius (1516–1571) discovered silver chloride, and the techniques described in Ibn al-Haytham's Book of Optics are capable of producing primitive photographs using medieval materials.
Albertus Magnus (1193–1280) discovered silver nitrate, and Georg Fabricius (1516–1571) discovered silver chloride, and the techniques described in Ibn al-Haytham's Book of Optics are capable of producing primitive photographs using medieval materials.
Daniele Barbaro described a diaphragm in 1566. Wilhelm Homberg described how light darkened some chemicals, photochemical effect, in 1694. The fiction book Giphantie, published in 1760, by French author Tiphaigne de la Roche, described what can be interpreted as photography.
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. He used paper or white leather treated with silver nitrate. Although he succeeded in capturing the shadows of objects placed on the surface in direct sunlight, and even made shadow copies of paintings on glass, it was reported in 1802 that the images formed by means of a camera obscura have been found too faint to produce, in any moderate time, an effect upon the nitrate of silver. The shadow images eventually darkened all over.
More information: The Spruce Crafts
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 Niépce's camera photographs required an extremely long exposure, at least eight hours and probably several days, he sought to greatly improve his bitumen process or replace it with one that was more practical. In partnership with Louis Daguerre, he worked out post-exposure processing methods that produced visually superior results and replaced the bitumen with a more light-sensitive resin, but hours of exposure in the camera were still required. With an eye to eventual commercial exploitation, the partners opted for total secrecy.
Niépce died in 1833 and Daguerre then redirected the experiments toward the light-sensitive silver halides, which Niépce had abandoned many years earlier because of his inability to make the images he captured with them light-fast and permanent.
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| Practising sports in Barcelona, 19th-20th centuries |
Daguerre's efforts culminated in what would later be named the daguerreotype process. The essential elements -a silver-plated surface sensitized by iodine vapor, developed by mercury vapor, and "fixed" with hot saturated salt water- were in place in 1837.
The required exposure time was measured in minutes instead of hours. Daguerre took the earliest confirmed photograph of a person in 1838 while capturing a view of a Paris street: unlike the other pedestrian and horse-drawn traffic on the busy boulevard, which appears deserted, one man having his boots polished stood sufficiently still throughout the several-minutes-long exposure to be visible.
The existence of Daguerre's process was publicly announced, without details, on 7 January 1839. The news created an international sensation. France soon agreed to pay Daguerre a pension in exchange for the right to present his invention to the world as the gift of France, which occurred when complete working instructions were unveiled on 19 August 1839. In that same year, American photographer Robert Cornelius is credited with taking the earliest surviving photographic self-portrait.
In Brazil, Hercules Florence had apparently started working out a silver-salt-based paper process in 1832, later naming it Photographie.
Meanwhile, a British inventor, William Fox Talbot, had succeeded in making crude but reasonably light-fast silver images on paper as early as 1834 but had kept his work secret.
More information: Science and Media Museum
After reading about Daguerre's invention in January 1839, Talbot published his hitherto secret method and set about improving on it. At first, like other pre-daguerreotype processes, Talbot's
paper-based photography typically required hours-long exposures in the
camera, but in 1840 he created the calotype process, which used the
chemical development of a latent image to greatly reduce the exposure
needed and compete with the daguerreotype.
In both its original and calotype forms, Talbot's process, unlike Daguerre's,
created a translucent negative which could be used to print multiple
positive copies; this is the basis of most modern chemical photography
up to the present day, as Daguerreotypes could only be replicated by rephotographing them with a camera.
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| Practising sports in Barcelona, 19th-20th centuries |
Talbot's famous tiny paper negative of the Oriel window in Lacock Abbey, one of a number of camera photographs he made in the summer of 1835, may be the oldest camera negative in existence.
In France, Hippolyte Bayard invented his own process for producing direct positive paper prints and claimed to have invented photography earlier than Daguerre or Talbot.
British chemist John Herschel made many contributions to the new field. He invented the cyanotype process, later familiar as the blueprint. He was the first to use the terms photography, negative and positive. He had discovered in 1819 that sodium thiosulphate was a solvent of silver halides, and in 1839 he informed Talbot and, indirectly, Daguerre, that it could be used to fix silver-halide-based photographs and make them completely light-fast. He made the first glass negative in late 1839.
In the March 1851 issue of The Chemist, Frederick Scott Archer published his
wet plate collodion process. It became the most widely used
photographic medium until the gelatin dry plate, introduced in the
1870s, eventually replaced it. There are three subsets to the collodion
process; the Ambrotype -a positive image on glass-, the Ferrotype or Tintype -a positive image on metal- and the glass negative, which was used to make positive prints on albumen or salted paper.
More information: Peta Pixel
Many advances in photographic glass plates and printing were made during the rest of the 19th century. In 1891, Gabriel Lippmann
introduced a process for making natural-color photographs based on the
optical phenomenon of the interference of light waves. His
scientifically elegant and important but ultimately impractical
invention earned him the Nobel Prize in Physics in 1908.
Glass plates were the
medium for most original camera photography from the late 1850s until
the general introduction of flexible plastic films during the 1890s.
Although the convenience of the film greatly popularized amateur photography,
early films were somewhat more expensive and of markedly lower optical
quality than their glass plate equivalents, and until the late 1910s
they were not available in the large formats preferred by most
professional photographers, so the new medium did not immediately or
completely replace the old.
Because of the superior
dimensional stability of glass, the use of plates for some scientific
applications, such as astrophotography, continued into the 1990s, and in
the niche field of laser holography, it has persisted into the 2010s.
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| Leisure in Barcelona, 19th-20th centuries |
Hurter and Driffield began pioneering work on the light sensitivity of photographic emulsions in 1876. Their work enabled the first quantitative measure of film speed to be devised.
The first flexible photographic roll film was marketed by George Eastman in 1885, but this original film was actually a coating on a paper base. As part of the processing, the image-bearing layer was stripped from the paper and transferred to a hardened gelatin support. The first transparent plastic roll film followed in 1889. It was made from highly flammable nitrocellulose, celluloid, now usually called nitrate film.
Although cellulose acetate or safety film had been introduced by Kodak in 1908, at first it found only a few special applications as an alternative to the hazardous nitrate film, which had the advantages of being considerably tougher, slightly more transparent, and cheaper.
The
changeover was not completed for X-ray films until 1933, and although
safety film was always used for 16 mm and 8 mm home movies, nitrate film
remained standard for theatrical 35 mm motion pictures until it was
finally discontinued in 1951.
Films
remained the dominant form of photography until the early 21st century
when advances in digital photography drew consumers to digital formats.
Although modern photography is dominated by digital users, film
continues to be used by enthusiasts and professional photographers.
More information: Dickerman Prints
The distinctive look
of film based photographs compared to digital images is likely due to a
combination of factors, including: (1) differences in spectral and
tonal sensitivity, S-shaped density-to-exposure (H&D curve) with
film vs. linear response curve for digital CCD sensors, (2) resolution
and (3) continuity of tone.
Originally, all photography was monochrome, or black-and-white. Even after color film was readily available, black-and-white photography continued to dominate for decades, due to its lower cost and its classic photographic look.
Originally, all photography was monochrome, or black-and-white. Even after color film was readily available, black-and-white photography continued to dominate for decades, due to its lower cost and its classic photographic look.
The tones and contrast
between light and dark areas define black-and-white photography. It is
important to note that monochromatic pictures are not necessarily
composed of pure blacks, whites, and intermediate shades of gray but can
involve shades of one particular hue depending on the process. The
cyanotype process, for example, produces an image composed of blue
tones. The albumen print process first used more than 170 years ago,
produces brownish tones.
Many photographers continue to produce some monochrome images,
sometimes because of the established archival permanence of
well-processed silver-halide-based materials. Some full-color digital
images are processed using a variety of techniques to create black-and-white results, and some manufacturers produce digital cameras that exclusively shoot monochrome.
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| Cultural traditions, Barcelona, 19th-20th centuries |
Monochrome printing or electronic display can be used to salvage certain photographs taken in color which are unsatisfactory in their original form; sometimes when presented as black-and-white or single-color-toned images they are found to be more effective.
Although color photography has long predominated, monochrome images are still produced, mostly for artistic reasons. Almost all digital cameras have an option to shoot in monochrome, and almost all image editing software can combine or selectively discard RGB color channels to produce a monochrome image from one shot in color.
Although color photography has long predominated, monochrome images are still produced, mostly for artistic reasons. Almost all digital cameras have an option to shoot in monochrome, and almost all image editing software can combine or selectively discard RGB color channels to produce a monochrome image from one shot in color.
Color photography was explored beginning in the 1840s. Early experiments in color required extremely long exposures, hours or days for camera images, and could not fix the photograph to prevent the color from quickly fading when exposed to white light.
The first permanent
color photograph was taken in 1861 using the three-color-separation
principle first published by Scottish physicist James Clerk Maxwell in 1855. The foundation of virtually all practical color processes, Maxwell's
idea was to take three separate black-and-white photographs through
red, green and blue filters. This provides the photographer with the
three basic channels required to recreate a color image.
Transparent prints of the images could be projected through similar color filters and superimposed on the projection screen, an additive method of color reproduction. A color print on paper could be produced by superimposing carbon prints of the three images made in their complementary colors, a subtractive method of color reproduction pioneered by Louis Ducos du Hauron in the late 1860s.
More information: ThoughtCo
Russian photographer Sergei Mikhailovich Prokudin-Gorskii made extensive use of this color separation technique, employing a special camera which successively exposed the three color-filtered images on different parts of an oblong plate. Because his exposures were not simultaneous, unsteady subjects exhibited color fringes or, if rapidly moving through the scene, appeared as brightly colored ghosts in the resulting projected or printed images.
Implementation of color photography was hindered by the limited sensitivity of early photographic materials,
which were mostly sensitive to blue, only slightly sensitive to green,
and virtually insensitive to red. The discovery of dye sensitization by
photochemist Hermann Vogel in 1873 suddenly made it possible to add sensitivity to green, yellow and even red.
Improved
color sensitizers and ongoing improvements in the overall sensitivity
of emulsions steadily reduced the once-prohibitive long exposure times
required for color, bringing it ever closer to commercial viability.
Autochrome, the first commercially successful color process, was introduced by the Lumière brothers in 1907.
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| The Grandma walks across La Maternitat Gardens |
Autochrome plates incorporated a mosaic color filter layer made of dyed grains of potato starch, which allowed the three color components to be recorded as adjacent microscopic image fragments. After an Autochrome plate was reversal processed to produce a positive transparency, the starch grains served to illuminate each fragment with the correct color and the tiny colored points blended together in the eye, synthesizing the color of the subject by the additive method. Autochrome plates were one of several varieties of additive color screen plates and films marketed between the 1890s and the 1950s.
Kodachrome, the first modern integral tripack or monopack color film, was introduced by Kodak in 1935. It captured the three color components in a multi-layer emulsion. One layer was sensitized to record the red-dominated part of the spectrum, another layer recorded only the green part and a third recorded only the blue. Without special film processing, the result would simply be three superimposed black-and-white images, but complementary cyan, magenta, and yellow dye images were created in those layers by adding color couplers during a complex processing procedure.
Agfa's similarly structured Agfacolor Neu was introduced in 1936. Unlike Kodachrome, the color couplers in Agfacolor Neu were incorporated into the emulsion layers during manufacture, which greatly simplified the processing. Currently, available color films still employ a multi-layer emulsion and the same principles, most closely resembling Agfa's product.
Instant color film,
used in a special camera which yielded a unique finished color print
only a minute or two after the exposure, was introduced by Polaroid in 1963.
More information: British Library
Color photography may form images as positive transparencies, which can be used in a slide projector, or as color negatives intended for use in creating positive color enlargements on specially coated paper. The latter is now the most common form of film, non-digital, color photography owing to the introduction of automated photo printing equipment. After a transition period centered around 1995–2005, color film was relegated to a niche market by inexpensive multi-megapixel digital cameras. Film continues to be the preference of some photographers because of its distinctive look.
In 1981, Sony unveiled the first consumer camera to use a charge-coupled device for imaging, eliminating the need for film: the Sony Mavica. While the Mavica saved images to disk, the images were displayed on television, and the camera was not fully digital.
In 1991, Kodak unveiled the DCS 100, the first commercially available digital single lens reflex camera. Although its high cost precluded uses other than photojournalism and professional photography, commercial digital photography was born.
Digital imaging uses an electronic image sensor to record the image as a set of electronic data rather than as chemical changes on film. An important difference between digital and chemical photography is that chemical photography resists photo manipulation because it involves film and photographic paper, while digital imaging is a highly manipulative medium. This difference allows for a degree of image post-processing that is comparatively difficult in film-based photography and permits different communicative potentials and applications.
Digital photography dominates the 21st century. More than 99% of photographs taken around the world are through digital cameras, increasingly through smartphones.
More information: History
Black and white is abstract; color is not.
Looking at a black and white photograph,
you are already looking at a strange world.
Joel Sternfeld
