Society of Motion Picture Engineers : incorporation and by-laws (1926)

Page scan 000568 from Society of Motion Picture Engineers : incorporation and by-laws

Record Details:

Title:
Society of Motion Picture Engineers : incorporation and by-laws
Date:
1926
Publisher:
New York : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1926)
Leaf #:
000568
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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170 Tra?2sactions of S.M.P.E., January 1927 In using this material for obtaining pictures by infra-red light it is only necessary to use a deep yellow or orange filter which absorbs completely the light of short wave-length to which the film is sensitive. Effects which suggest night scenes can be made by using hypersensitized panchromatic film with a deep red filter such as Wratten No. 25 or No. 29. The result is much more striking, however, and approaches the true night or moonlight effect when Panchromatic K film is used with a red filter such as No. 25. The sensitivity^ of this material to the infra-red radiation is such that under bright sunlight conditions outdoor motion pictures at standard speed can be made Fig 25. Photograph of landscape made in full sunliglit on Panelnomatic K film Avith infra-red filter. with a lens having an aperture of f.3.5. This applies to the most favorable conditions. In case the sunlight is not of highest intensity it may be necessary to use a lens working at f.1.9. In Fig. 25 is shown the reproduction of a photograph made on Panchromatic K film. Development of. Panchromatic Film Dark Room Illumination Since panchromatic film is almost equally sensitive to all colors, including red, the film would be fogged if handled in the dark room