1907 price list, cancelling previous lists, of light filters, cameras, and all materials for orthochromatic and colour photography : scientific instruments for light measurement, photo spectroscopes, photo micrographic appliances, etc. (1907)
d to give the best possible correction for a given increase in exposure. They are made to require 3, 5, 10 or 15 times the normal exposure. Series C. These are permanently sealed filters of high luminosity and great transparency, i.f-., pure colours without admixture of black. They are much… … S. 6 &'7. GRAY'S INN PASSAGE. LONDON, W.C.
Photography -- Equipment and supplies · Photography, Orthochromatic · Color photography
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