Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
000395
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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390 D. NORWOOD [j. s. M. p. E. extent a subject that has developed some rather confusing phases. There will be described some simple tests, in which the action of exposure meters will be examined. Negative exposure bears a rather close relationship to several other elements concerned in picture making. A close examination of some of these elements, and the relationships between them will serve to bring out some rather interesting facts. One of the elements is the appearance of the photographic subject to the human eye. It is this appearance that we hope to reproduce, within photographic limitations, in the print. Another element is the appearance of the photographic subject in the print. Still another is the exposure that must be used to make the print from the negative, and yet another is the matter of subject brightness and its components of incident light and reflectance. FIG. 1. Two-card test panel. Let us consider a simple case, and note how the various elements and relationships are affected. Fig. 1 is a panel composed of cards showing two shades of gray. Suppose that a picture were to be made to include this panel and nothing else. Any experienced photographer, upon viewing the panel, can form a mental picture of how a paper print should reproduce what he sees here. His mental picture will establish fixed densities of silver deposit on the print, which will serve to reproduce what the eye sees first hand. Upon turning on additional light, the intensity of illumination on the panel, which previously was just nominal, will be increased manyfold. During a short transition period the panel will appear intensely bright, but after a short lapse of time one becomes accustomed to the new level of illumination.