Motion picture photography (1927)

Record Details:

Title:
Motion picture photography
Date:
1927
Publisher:
New York : Falk Publishing Company, Inc.
Volume:
Motion picture photography
Leaf #:
00043
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
September 21, 2023
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T IT E NATURE OF LIGHT back. It is because of this fact that we are enabled to see objects and to photograph them. The kind or quality of light reflected enables one to photograph objects. The violet light is quite active photographically, while the other end of the spectrum, red, is not. If the object reflects all blue or violet the photographic sensitive surface will be strongly affected and the object easily photographed, but if the object reflects yellow and red waves only, the sensitive surface will be only feebly affected. Fig. 6. Production of the spectrum by means of a prism. It is for this reason that photographic operations are carried on in dark rooms which are illuminated only by faint red or orange light. All dark room lights should be carefully tested by exposing a sample of the most sensitive surface that is 10 be worked under the light in question for a greater period of time than such sample would be exposed under any ordinary working conditions. If on development the sample shows traces of fog, the light should be changed or its intensity decreased. When a certain color of light predominates, the unaided eye is not able to distinguish a contamination of another color, consequently wherever possible it is very desirable to make a spectroscopic examination of the light passed by screens used for dark room illumination. 33