Society of Motion Picture Engineers : incorporation and by-laws (1922)

Page scan 000175 from Society of Motion Picture Engineers : incorporation and by-laws

Record Details:

Title:
Society of Motion Picture Engineers : incorporation and by-laws
Date:
1922
Publisher:
New York : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1922)
Leaf #:
000175
Language:
English
Subjects:
motion pictures, Cinematography -- Periodicals
Collection:
Technical Journals
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:
Preceeded by an unnumbered issue published in 1916 called: Incorporation and by-laws
Date Added:
September 12, 2024
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absorption of the lens, however, probably cannot be ignored and certainly cannot be neglected if the balsam used in cementing the elements has not been carefully bleached since the slightest yellow color robs the light of a great deal of its actinic power. It is suspected that in cases not only has one neglected the effects of absorption and reflection but lenses have been marketed which were erroneously marked as regards F-number. 3. In view of this, it is believed to be well worth while that a study be made of some of the principal lenses in order to determine their actual efficiency in transmitting the light to the film. 4. We thank you for calling our attention to this matter and wish to feel free to call upon you for suggestions as the work progresses." It is possible that the foregoing matter might properly be referred at this time to our Standards Committee, for further action, or to the Optics Committee, for co-operation with the Bureau of Standards. The problem is manifestly not one for the Camera Committee, which is interested only in the results which the lenses furnish. J. H. McNabb, Chairman 165