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 #:
00089
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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72 A. S. HowELL AND J. A. DUBRAY [J. S. M. P. E: less noticeable will be the differences in depth of focus, a characteristic of photographic objectives too well known to warrant discussion in this paper. We may also mention that the constant use of an extremely large range of focal lengths imposed upon the cinematographer by the technic of sound and picture synchronization has been one of the causes which have justified general severe criticisms on the photographic quality of talking pictures. It may prove of interest here to give some consideration to the covering power of the photographic objectives in use today and to consider their adaptability to the proposed new dimensions. Let FIG. 6. Covering power of an//2.5, 47 mm. lens. us take, as an example, a 47 mm. lens and its adaptability to the "Economic" dimensions. Fig. 6 shows the full area covered by an//2.5, 47 mm. focal length Taylor-Hobson Cooke lens. The actual diameter of the object was 10 ft. and the camera was set 8 ft. 8 in. away from it. The subject was so prepared and photographed that the rectangle traced in the center of the circle was reduced on the photographic plate to the size of the camera aperture for the "Economic." The 8 ft. 8 in. distance from the lens to the object was decided upon for convenience in manipulation, with due consideration to the fact that the diameter of the image area would be only slightly increased over the diameter