16th Century painters used dark rooms with a pinhole in the wall or project landscapes onto canvas. They would wait for the light to be right and shine through. The image is cast upside down and artists sketched out the shapes.
"The earliest reliably dated photograph of people, taken by Daguerre one spring morning in 1838 from the window of the Diorama, where he lived and worked. It bears the caption huit heure du matin (8 a.m.). [...] The long exposure time (about ten or twelve minutes) meant that moving traffic cannot be seen; however, the bootblack and his customer at lower left remained still long enough to be distinctly visible."
|File Size:||225 kb|
| || |
"In 1851, Scott Archer proposes "Collodion" process. Collodion (a solution of nitrocellulose in a mixture of ethyl alcohol and ethyl ether) forms a binder for silver iodide on glass. Exposure and processing is performed immediately after coating plate.
Scott Archer did not patent the process and died in poverty. Two versions of this process were "Ambrotype" and "Tintype." Exposure was about 10 seconds. The Collodion process greatly expanded photography and brought everyone into contact with its results." -- Ted Photographics
A disadvantage [to the wet plate process] is that the glass plates had to be exposed and developed while it was still wet with collodion. This means that dark rooms would have to be portable. Also, the glass plates were so fragile and broke easily."
Recorded discovery of color photographic process: "[Thomas] Sutton was the photographer for James Clerk Maxwell's pioneering 1861 demonstration of color photography. In a practical trial of a thought-experiment Maxwell had published in 1855, Sutton took three separate black-and-white photographs of a multicolored ribbon, one through a blue filter, one through a green filter, and one through a red filter."
"Using three projectors equipped with similar filters, the three photographs were projected superimposed on a screen. The additive primaries variously blended to reproduce a gamut of color. The photographic materials available to Sutton were mainly sensitive to blue light, barely sensitive to green and practically insensitive to red, so the result was only a partial success." -- Source