International Review of Educational Cinematography (Jul-Dec 1929)

Page scan 000286 from International Review of Educational Cinematography

Record Details:

Title:
International Review of Educational Cinematography
Date:
Jul-Dec 1929
Publisher:
International Educational Cinematographic Institute
Volume:
International Review of Educational Cinematography (Jul-Dec 1929)
Leaf #:
000286
Language:
English
Collection:
Non-Theatrical Film
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Date Added:
September 12, 2024
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they are inclined at an angle of ninety degrees. This inclination permits the use of the usual longitudinal format and is a result of the horizontal course of the film during the making. Consequently the film ought to run horizontally, also during the projection, for otherwise the pictures would be reproduced "CD <] a o a a a a a a <1 1 <| a a a o a a CD <] <l a a □ a A Zx Fig. i with the aforesaid inclination of ninety degrees. Now, in order to be able to use ordinary projectors the vertical movement of the film is maintained and the angular inclination of the images avoided by means of adjustment prisms. Figure two shows the filming system and the finder. It is composed chiefly of a double prism with a reflective semitransparent surface which divides the luminous rays reaching it, Fig. 2 deflecting them partly directly and partly by reflection to the objectives 01 and 02. Thes eobjectives, by the aid of the red and green philtres, f.I. and f2, project the two partial images bl and b2 — 272