The science and practice of photography : an elementary textbook on the scientific theory and a laboratory manual (1920)
Roebuck, John R. (John Ransom), 1876-1965 · New York ; London : D. Appleton and company · leaf 60
PHOTOGRAPHY 38 Let us examine further the way we have plotted the exposure. If E is the exposure, we may put E « 10^ … where v is a suitable number and then multiplying E by a factor means making an addition to V. For example if we multiply by 10, then loE »= lo^Xio = Or if we multiply by any number X, we can always write X = 10“ where n is a suitable number, and therefore XE = 10^X10“ * io^+“ So that we really…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
