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He was a mathematician, painter, English (1800-1877). At this time the camera obscura was used, it worked in the following way you put the paper on top of the diagram and you traced it, the lens focused on what you were looking at.
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But not getting the desired results he began to experiment with silver nitrate and sodium thiosulfate to create the perfect camera and image; that was how in 1839 he managed to keep the image on paper.
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You had to be a chemist to take pictures. Then Kodak came and said that there was no need to educate the public at all. "You push the button, we do the rest."
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In the 1930s the Kodachrome, a color reel, was popularized, and that was a very basic 35mm prototype.
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Polaroid introduced instant photography.
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At this time you did not need a light meter to measure the light separated from your camera, it came integrated, things were easier.
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Instamatic. It was again 1888, everyone could be a photographer. In the 80's Minolta arrived with its autofocus system.
