Traditional Culture Encyclopedia - Photography and portraiture - What are the stages of cameras and photosensitive materials? Characteristics of cameras and photosensitive materials at different stages.
What are the stages of cameras and photosensitive materials? Characteristics of cameras and photosensitive materials at different stages.
1839, Frenchman Daguerre made the first practical silver camera, which consisted of two wooden cases. One wooden box is inserted into another to focus, and the lens cover is used as a shutter to control the exposure time for up to 30 minutes, so that a clear image can be taken.
1860, Sutton, England designed the first single-lens reflex camera with a rotatable viewfinder. 1862, Detrie, a Frenchman, stacked two cameras together, one for taking pictures and the other for taking pictures, forming the prototype of a dual-lens camera. 1880, Baker of England made a double-lens reflex camera.
With the development of photosensitive materials, dry plates coated with silver bromide photosensitive materials appeared in 187 1 year, and films based on nitrocellulose (celluloid) appeared in 1884.
With the appearance of magnifying technology and particle film, the quality of lens has been improved accordingly. In 1902, Rudolf made a famous "Tiansai" lens by using the third-order aberration theory established by Cedell in 1855 and the high refractive index and low dispersion optical glass successfully researched by Abbe in188/0/year. Due to the reduction of various aberrations, the imaging quality is greatly improved. On this basis, in 19 13, a small Lycra camera with 35 mm film punched in the negative was designed and manufactured in Barnach, Germany.
However, all the 35 mm cameras in this period used perspective viewfinders without rangefinders. 1930 to make color film; 193 1 Germany Contex camera has been equipped with a double-image coincidence rangefinder based on the principle of triangular ranging, which improves the focusing accuracy, and adopts aluminum alloy die-casting body and metal curtain shutter for the first time.
1935, a single-lens reflex camera of Ek Saquetoux appeared in Germany, making it easier to focus and change lenses. In order to make the camera exposure accurate, Kodak camera began to install selenium photocell exposure meter at 1938. 1947, Germany began to produce Contax S five-prism single-lens reflex camera, which made the viewfinder image no longer upside down, and changed the top view to head-up focusing framing, making photography more convenient.
- Previous article:Does Qingdao Raphael Medical Technology Co., Ltd. produce masks?
- Next article:What the hell are crop circles?
- Related articles
- Fujian Normal University Admissions Office Tel
- How to buy a cute photo app?
- How can people without education improve themselves?
- Please analyze the Gemini woman on June 10, 1999
- Five Minority Literature Movies to Improve Aesthetics
- The places to play in Hefei at night are understandable.
- I want to go to Tianjin for a few days on May Day, and I want to consult the specific travel strategy.
- What are the skills of flower photography in spring?
- What are the sayings of blessing?
- A writer's Odyssey has many hidden details. What did you find?