15 Jul The photograph is a production technique of images
Brief history of photography. The photograph is a production technique of images, obtained thanks to the chemical action exerted by light or other forms of energy.
You can not define a specific date and a specific inventor of photography , because it is an event that has evolved over the centuries, prepared by different intuitions, by research and confirmations.We can go back to Aristotle, who lived in the fourth century. B.C
and his observations on light, colors and the sense of sight.
The first true scholars, however (1400), who came to the discovery of the technique of photography with the camera obscura , are the AI-Kindi and AI-Hazen Arabs.
They observed that inside a dark room, by making a small, thin hole on a wall, one can see a confused image of the exterior projected upside down on the opposite wall.
The simple hole, during the `600, is replaced by a meniscus lens: the figure was rather inaccurate due to the poor quality of the objectives.
Another theory dates back to the end of the Middle Ages, when the alchemists, by heating the sodium chloride (or kitchen salt) together with the silver, had discovered that a gas, chlorine, was released from the salt, which combined with the silver, caused the formation of a compound, the silver chloride, white in the darkness, but violet or almost black with exposure to the sun’s rays.
It was therefore natural that, at a certain point, the idea was born of using the singular property of light rays to obtain images on the surface of chemical substances sensitive to light.
In the 18th century, illustrious chemists tried to solve the problem, but they managed to obtain only contours of images, ie silhouettes (the name derives from Stefano Silhouettes who was the initiator of fashion to be portrayed).
The German chemist Johann Heinrich Schulze “baptized” photography in the 18th century .
Another collaborator was Niepce , the first to get something with metal plates covered with bitumen of Judea (a substance that weakens lightly in the light).
Niepce found himself forced to accept a relationship of collaboration with Daguerre (painter), also for professional reasons, to experiment with the darkroom.
Daguerre came to the invention of the “daguerreotype” (1837), which consists of a sheet of silver-coated copper that is exposed to the action of iodine. The image, slightly hinted at in the camera, becomes evident and positive to mercury vapor and It is fixed with a washing in warm and salty
water.Thanks to a series of political maneuvers, the invention is bought by the French government.In the meantime in England Talbot worked on its own with a silver chloride paper and obtained the first negatives on paper (1834)
From the discovery of photographyup to now it can be said that nothing has been left unanswered nothing is more absolutely original.
The photograph was not considered art autonomous.
The images served as sketches for the painters, the “Art” de came later.
The photographs became gift items and were exchanged as business cards. Their collections gave birth to the need for the album.
The photograph is used to identify themselves and present their social status, even telling lies.
Today, however, the use of the manual camera has gone out of fashion, in fact there are not many people who own one of these jewels at home; all now go on the modern, ranging from automatic machines to digital ones, which have had a boom in the last ten years (they have the ability to modify the photo in any way through the computer).Fortunately, however, there are still some enthusiasts, in addition to professional photographers who buy and use machines that have made the history of photography .