Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
000378
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

358 CINEMATOGRAPHIC ANNUAL camera. These lamps expose a portion of the film outside the sprocket holes and are connected in series so that instantaneous exposures are made on the sound negative and picture negative. In order that the rate of exposure of the sound track may be constant and uniform on all takes, the brilliancy of the light beam is measured by means of a photometer. A photometer is a detachable device which can be plugged into the recorder drum while the exposure lamp is being adjusted. The small lamp in the photometer is always operated at a certain value of current, this value being determined by careful sensitometric measurements. The brilliancy of the exposure lamp is then compared with the brilliancy of the photometer lamp and when the photometer screen shows the same brilliancy for both, the exposure lamp is burning at its optimum value. The sound track negative is developed in the laboratories to a density of about 1.6. This provides for a light transmission of about 2i/2% These figures are average and are adherred to because above this density the fog factor increases to such an extent that the high frequency striations become filled in or indistinct and produce a fuzzy reproduction.