Big Silent Fan wrote:From what I gathered from the story, the experiment wasn't a big success originally because of the difficulity projecting the three seperate films into one image on a screen.
It's only because it could be digitized today that we're able to see this stunning clip, hidden for a century without any way of seening it before.
The three-colour films made by Edward Turner were certainly not a success - he never managed to work out how to bring the three sequential images he took, one for each colour (red-green-blue) and project the results as a composite colour image. The considerable complexity of the projection apparatus, together with a required speed of 48 frames per second meant that the results were unwatchable, and the films were shown to an audence. This account from an unpublished piece of writing of mine explains how the projector was meant to work:
British Patent (B.P.) no. 6,202 (1899), was issued on 22 March 1899, ‘Means for taking and exhibiting cinematographic pictures’. The patent describes a conventional cine camera with its shutter replaced by a rotating wheel with red, green and blue filters, interspersed with opaque sections, which could be attached in front of or behind the lens, in synchronisation with the movement of the film through the camera. The film passing through the camera would therefore record in succession a red, green and blue record, though the patent gives no indication of the speed (in frames per second) that would be required. The film was to be shown through a three-lens projector of some complexity. It was to have three lenses arranged close together vertically, with a triple gate that allowed the three successive images to be projected together and superimposed. To move three inches of film intermittently would put far too great a strain on the film, hence there was the need for three lenses, with each frame projected through each lens in turn. A synchronised shutter to provide the colour was attached, with three opaque sections alternating with three filter sections bearing concentric bands in the primary colours. The pattern of these concentric bands altered, and hence the light illuminating each red, green and blue record passed through the appropriate colour filter at the upper, middle and lower lens.
Colour experimenter and film processor G.A. Smith wrote about witnessing the results:
It was when we came to superimpose the pictures on the sheet through three-coloured glasses that we found the process unworkable. As soon as the handle of the projecting machine was worked the three pictures refused to remain in register, and no knowledge that any of us could bring to bear upon the matter could even begin to cure the trouble. The difficulty is mainly due to the fact that cinematograph pictures are small to begin with, and they have to be enormously magnified in exhibiting, as you all know. The slightest defect in registration it pitilessly magnified, and when the minute defects of registration in the first three pictures are followed by minute defects of another sort in the next three, and by yet another sort in the succeeding three, and so on throughout the length of a film, the effect on the observer is almost unbearable.
The National Media Museum's digital restorations therefore show what could not be achieved in 1902, though they do prove that Turner's system was capable of capturing a reasonably faithful natural colour motion picture. Despite what some news reports say, the films are not a recent discovery - they have been stored for decades. Turner died in 1903, and the producr Charles Urban (who had been funding him) handed over the project to G.A. Smith, who took away the blue filter, and came up (in 1906) with Kinemacolor, which was successfully commercialised. For the Turner colour story, see
http://thebioscope.net/2008/01/27/colou ... le-effect/" target="_blank.
A successful three-colour additive system was eventually developed by Gaumont at Chronochrome - see
http://thebioscope.net/2008/09/14/colou ... onochrome/" target="_blank.
The same concept was done long ago in Russia to produce stunning Colour images using three slide projectors with color filters, but it would likely be impossible to repeat the process with moving pictures.
Prokudin-Gorski did experiment with three-colour cinematography in the early 1920s, but I don't know of the details.
Luke