Mees, C. E. Kenneth (Charles Edward Kenneth), 1882-1960, Eastman Kodak Company · Rochester, N.Y. : Eastman Kodak Company · leaf 112
is that it should produce the greatest possible effect with the least possible increase of exposure, so that a filter will be considered most efficient when it produces the maximum result with the minimum multiplying factor. To a certain extent the multiplying factor depends upon the result that is… … For many purposes, however, Fig. IK'- the Kodak Color Filter is too Kodak sky Filter. strong; the exposure when usin.u it is so prolonged that it is not practical to use the Kodak without a tripod, and to meet these difficulties the Kodak Sky Filter has been intro- duced. (Fig. 110.) 108
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
