Photography is the process and art that makes it possible to record and reproduce, through chemical reactions and on surfaces prepared for this purpose, the images taken at the back of a darkroom.
The principle of the camera obscura consists of projecting the image that is captured by a small hole on the surface. In this way, the image size is reduced and its sharpness can be increased.
The image obtained can be stored on a sensitive film or in CCD and CMOS sensors or digital memories (in the case of so-called digital photography).
In 1694, the Dutchman Wilhelm Homberg discovered that by exposing certain chemicals to light , such as silver chloride, they turned dark. And this discovery, later on, was of great importance for photography.
The daguerreotype, invented by Louis Daguerre in 1839, is considered the precursor of modern photography. Daguerre used a layer of silver nitrate over a copper base. The positive was projected onto mercury and the image was fixed by introducing the plate into a solution of sodium chloride or diluted sodium thiosulfate.
George Eastman was a great promoter of photography when, in 1888, he presented the first Kodak camera with a roll of photographic paper. This technique replaced the glass plates. Another important step took place in 1948, with the launch of the Polaroid technique that allows the development of photos in just one minute.
Photography was and continues to be the only way to immortalize something that is important, be it a place, an object, a special moment or even special people. Photography was an important instrument for recording moments in human history.
And there is also macro photography (recording small things such as insects) which is very important to present details that would go unnoticed by human eyes. It uses films with low sensitivity so that no photo information is lost.
And today, with digital photography, obtained through smartphones, tablets and professional cameras, photography has become an even greater need for human beings . Remarkable moments such as a wedding, birthday, graduation, baby’s first steps, a trip, events, among others, have photography as an essential item to freeze them.
And this photograph obtained through electronic devices can be modified through software (by computer) or applications for mobile devices, being able to perform basic procedures such as changing colors, increasing or reducing brightness, to more complex procedures such as removing imperfections or adding something or someone. to this photo. And this file can still be sent by email or posted on online platforms.
Currently, different techniques, equipment, software, applications and resources are used to make photography.
It is important to bear in mind that, in addition to being used for scientific purposes, photography has become an art. Images taken by artistic photographers are displayed in exhibitions and museums.
And, just as poets try to express and explain feelings through their verses, photography is also an important instrument for, through images, representing feelings such as joy, sadness, fear , indifference, reflection and many others.
List of Acronyms Related to Photography