Wall, E. J. (Edward John), 1860-1928 · Boston, Mass., American Photographic Publishing Co. · leaf 154
that it is necessary to insert between the object and ; its image a correcting or compensating filter, which re- i duces the rendering of the colors by the plate to that seen by the eye. In Fig. i8 are shown two curves rep- resenting the luminosity of the spectral colors as seen by the human eye… … about wave-length 5500 in the yellow-green. By an error in making the drawing, the wave-lengths are there given in hundreds instead of thousands. An extra zero should be added to each number to make them agree with the text. The filter that will shift the plate’s vision so as to coincide with that…
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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