A condensed course in motion picture photography ([1920])

Record Details:

Title:
A condensed course in motion picture photography
Date:
[1920]
Author:
New York Institute of Photography
Publisher:
New York, New York Inst. of Photography
Volume:
A condensed course in motion picture photography
Leaf #:
00069
Language:
English
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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MOTION PICTURE PHOTOGRAPHY iist. Double Convex. 2nd. Piano Convex. 3rd. Convexo-Concave. {1st. Double Concave. 2nd. Piano Concave. 3rd. Concavo-Convex. The first are thickest in the center, while the second are thinnest in the center. Fig. 21. A, B, C, positive or converging lenses. D, E, F, negative or diverging lenses. A, double convex; B, plano-convex; C, convexoconcave or meniscus; D, double concave; E, plano-concave; F, concavo-convex. These simple forms may be made up of one single piece of glass or they may be composed of several cemented together, as will be seen later. Diagram 21, illustrates these forms of lenses. All lenses, whether considered singly or in combination, have the following properties : 1. Principal axis. 2. Optical center. 3. Principal and conjugate foci. 4. Nodal points. 1st. Principal axis of a lens is a line passing through the thickest part of positive lenses and thinnest part of negative 48