When did photography become an art form?

1, the French scientist Niepce completed the earliest experiment about photography in the 1920s of 19, and took the earliest permanent images in 1826. 21On August 9th, 839, the French Academy of Sciences announced to the world the silver disk photography of French scientist Daguerre, which briefly exposed the metal plate coated with photosensitizer with a camera, and then directly obtained quite realistic images through the chemical action of the liquid medicine. At the same time, Talbot, a British scientist, successfully converted negative images into positive images through camera experiments, which laid the foundation for the development of photography. 1839- 1924 is the primary stage of photography technology. 184 1 year, the first all-metal camera was born. 185 1 year, physicist Maxwell took the world's first color photo. 1866, German chemists and mathematicians joined hands to invent barium crown optical glass in Zeiss, Germany, and produced several groups of positive camera lenses. 1868, French scientists put forward a set of more perfect color photography methods. 1877, natural color photos were completed with three-color filters. 1888, Kodak Company of the United States coated gelatin with emulsified silver sensitizer, and manufactured a new type of photosensitive material-soft windable film.

In the same year, Kodak also invented the world's first portable cassette camera with this film. 1936, Kodak Company produced the first subtractive color reversal film with three-layer emulsion. 1925, until the 1960s, was the second stage of the development of photography technology. 1925, Leeds company in Germany produced the first batch of 135 head-up paraxial cameras in the world. This camera with aluminum alloy body, five-lens lens and focal plane shutter is named "Leica". 1929, Germany Lulai company produced the world's first dual-lens reflective 120 camera, named Luleflex. Fifty years later, China Seagull Camera inherited its technology and photography style. 1948, the former GDR produced the world's first 135 pentaprism single lens reflex camera-Contax S.

In the same year, Sweden produced the world's first combined 120 single-lens reflex camera-Hasselblad. 1977, Liu Xiaoxi photographic industry co., ltd produced the world's first autofocus 135 head-up paraxial camera-konica C35AF. 1985, Minolta Company of Japan produced the world's first A7000 single-lens reflex camera with built-in motor. 1989, Canon Company of Japan produced EOS- 1 135 single-lens reflex camera. The autofocus system driven by ultrasonic motor was adopted, which made the autofocus function of the camera enter a new stage of rapid noise reduction and predictive autofocus function.

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