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Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974)
[ACTIVE]

Transmission Apertures (T-Stops) for Taking Lenses

Metadata

Publisher
SMPTE — White Plains, NY, USA
Doc Type
Journal Article
Content Type
Original Research
Abbreviated Title
J SMPTE
Volume
83, No. 3, pp. 176–180
Abstract
The geometrically defined relative apertures,f-stops, engraved on objective lenses, are quite imprecise as measurements of the amounts of light actually transmitted, especially for zoom lenses with their many glass-air interfaces. This can lead to errors in exposure as a consequence of reflection, absorption and other light losses within the objective. The problems and the needs for the standardization of true transmission stops are discussed. A photometric measuring method in accordance with the German standard draft DIN 19 010, sheet 2 (photoelectric exposure meters, automatic exposure adjustment in photographic cameras) is presented for discussion.
Publication Date
1974-03-01
DOI
10.5594/J08805
ISSN
Print: 0361-4573
Link
https://doi.org/10.5594/J08805
Author(s)
Hans JensenMarderstraat 26, D2000 Hamburg 65, Germany
Copyright
© 1974 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

  • 1. DIN 19 010, Sheet 1, Photoelectric Exposure Meters; Scales; Calibration. EXTERNAL
  • 2. DIN 19 010, Sheet 2, Photoelectric Exposure Meters; Automatic Exposure Control in Photographic Cameras. EXTERNAL
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Hans Jensen; Transmission Apertures (T-Stops) for Taking Lenses, Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974); SMPTE, 1974. Available at https://doi.org/10.5594/J08805
Snippet:
Hans Jensen; Transmission Apertures (T-Stops) for Taking Lenses, Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974); SMPTE, 1974. Available at https://doi.org/10.5594/J08805

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Hans Jensen; Transmission Apertures (T-Stops) for Taking Lenses, Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974); SMPTE, 1974. Available at https://doi.org/10.5594/J08805
Snippet:
<span class="citation">Hans Jensen; <cite>Transmission Apertures (T-Stops) for Taking Lenses</cite>, Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974); SMPTE, 1974. Available at <a href="https://doi.org/10.5594/J08805" target="_blank" rel="noopener">https://doi.org/10.5594/J08805</a></span>

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Preview:
Hans Jensen; Transmission Apertures (T-Stops) for Taking Lenses, Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974); SMPTE, 1974
doi: 10.5594/J08805
url: https://doi.org/10.5594/J08805
Snippet:
<li>
Hans Jensen; <cite id="bib-10-5594-j08805">Transmission Apertures (T-Stops) for Taking Lenses</cite>, Journal of the SMPTE ( Volume: 83, Issue: 3, March 1974); SMPTE, 1974
<span class="doi">10.5594/J08805</span>
</li>