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    "abstract": "RECENT developments in condensing lenses for motion picture projection embodying the use of non-spherical surfaces call for changes in other parts of the optical train in order to reap the full advantage of condensers of this type. Aside from the aperture, whose size is fixed, the other elements of the optical system have been designed and positioned to fit the objective lenses available. The assumption has been that since any change in the design of the objective lens involved in addition to its relation to the optical system, such factors as definition, flatness of field, freedom from chromatic aberration and distortion, it was far simpler to alter the other elements of the system, possibly at a sacrifice of their own efficiency.",
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      "updated": "2026-05-22T23:54:08.922Z",
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    "authors": [
      "R. E. Farnham"
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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      "holder": "Society of Motion Picture and Television Engineers, Inc.",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
        "version": "smpte-journal-issue-xml@v1"
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      "year": "1923",
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        "confidence": "high",
        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
        "source": "parsed",
        "updated": "2026-05-22T23:54:08.922Z",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
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    "docId": "10.5594-jj00018",
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    "docLabel": "Transactions of the Society of Motion Picture Engineers ( Volume: 7, Issue: 17, 1923)",
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    "docTitle": "Relation of Objective Lens to the Efficiency of the Optical System",
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
      "source": "parsed",
      "updated": "2026-05-22T23:54:08.922Z",
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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    "journalAcronym": "MIJR",
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      "confidence": "high",
      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
      "source": "parsed",
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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      "updated": "2026-05-22T23:54:08.922Z",
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        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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        "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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      "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/METADATA and PDFs ALL CONTENT/Journal/smptej_7_17/MIJR16Vol7No17.xml)",
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