Agfa motion picture topics (Apr 1937-June 1940)

Record Details:

Title:
Agfa motion picture topics
Date:
Apr 1937-June 1940
Publisher:
Hollywood : C. King Charney, Inc.
Volume:
Agfa motion picture topics (Apr 1937-June 1940)
Leaf #:
00035
Language:
English
Collection:
Technical Journals and Hollywood Studio System
Format:
Periodicals
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
November 02, 2023
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HOME OF REPUBLIC STUDIOS' Photographed by Joe Walters Agfa Superpan Panchromatic Emulsion. This type responds to practically all wave lengths within the visible range of radiation and extends its sensitivity even further towards red and naturally, also, into ultra-violet range. It is the type generally used for picture negative production. Infra-Red Emulsion. This type, in addition to the original blue sensitivity of the Silver Bromide, is sensitized for visible dark red and extends its sensitivity more or less into the invisible range of Infra-Red radiation. It is used in scientific work such as astronomical photography, special effects, particularly artificial night scenes, aerial photography, cloud effects, and long distance shots where aerial haze prevents registration on other types of emulsions. The spectral sensitivity curve of a photographic emulsion is commonly determined by means of a spectrograph. This instrument permits only relative judgment or comparison of color sensitivity, and the results obtained might be of very little practical value. In practice, the color sensitivity is usually tested by actual reproduction of colored objects in conjunction with the use of light filters. Referring to the discussion of the relation between color sensitivity of photographic emulsions and visual sensitivity, it might be well to first refresh the mind of the reader on some of the fundamentals and terminology of color. Page Thirteen