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Sam was born in 1979, his father was raised in London and his mother in Barcelona so Sam and the family spent the early years of his life between the two cities finally settling in London for his teenage years. (read more)
Sergey Mikhaylovich Prokudin-Gorsky was a Russian chemist and photographer. He is best known for his pioneering work in colour photography of early 20th century Russia.
His own research yielded patents for producing colour film slides and for projecting colour motion pictures. His process used a camera that took a series of three monochrome pictures in sequence, each through a different coloured filter. By projecting all three monochrome pictures using correctly-coloured light, it was possible to reconstruct the original colour scene. Any stray movement within the camera’s field of view showed up in the prints as multiple “ghosted” images, since the red, green and blue images were taken of the subject at slightly different times.
The exposure time of the frames is likely to have varied, even if the developed negatives were later on similar glass plates. In a letter to Leo Tolstoy requesting a photo session, Prokudin-Gorsky described each photo taking one to three seconds, but when recollecting his time with Tolstoy, he described a six second exposure on a sunny day. Blaise Agüera y Arcas estimated the exposure of a 1909 photo taken in broad daylight to have had combined exposures of over a minute, using the movement of the moon as comparison.
Source: wikipedia
