Journal of the Society of Motion Picture Engineers (1930-1949)

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Finally, with an eye toward the future, attention was called to the potentialities of half photographic/ half magnetic track on 16mm film and magnetic track substituted for photographic on 35mm film. Sound This meeting followed on the heels of the above Subcommittee meeting but in actuality the two meetings were held jointly. The Sound Committee now approved for letter ballot the six proposals approved by the Subcommittee and a seventh on 200-mil magnetic coating of 16mm single perforated film (SMPTE 544) submitted by the Subcommittee some time prior to this meeting. In addition it was agreed to revise the three test film standards listed below. The revision would permit elimination of the identification leader and substitution of titles printed lengthwise in the picture area. This would increase the usable test film footage by about 25% without increasing its cost. Z22.42-1946, 16mm 5000 and 7000-Cycle Sound Focusing Test Films; Z22.45-1946, 16mm 400-Cycle Signal Level Test Films; Z22. 57-1 947, 16mm Buzz Track Test Films. Stereo This committee was formed in March 1952 with immediate attention devoted to development of a standard nomenclature and compilation of a bibliography. Prior to this first meeting the committee was very active in nomenclature activity via the mails. The entire meeting was therefore devoted to reviewing this activity and working out word for word the meanings of some of the more controversial, complex terms. In briefly commenting on the bibliography project, John Norling, Chairman, stated that progress was being made and that a first draft would soon be issued to the committee for review. Television Film This meeting had been Equipment called for only one reason: to expedite action on dimensional standards for the recorded and reproduced area of televised motion pictures. Differences had developed between East and West Coast thinking on this question which had prevented standardization to date. The advantages and disadvantages of both proposals were thoroughly aired and a compromise proposal was offered for consideration. It was finally agreed to submit the latter proposal for letter ballot of the full committee. The vital dimensions of all three proposals are: 35 mm Record Reproduce East .609 X .812 .582 X .776 West .619 X .825 .600 X .800 Compromise .612 X .816 .594 X .792 16mm East . 288 X . 384 . 270 X . 360 West .288 X .384 .279 X .372 Compromise . 285 X . 380 . 276 X . 368 Color This was the first meeting of this committee under its new Chairman, Dr. J. P. Weiss. The committee reviewed the state of the art and concluded that color was still in the early stages of development, which precludes any standards work at this time. It was noted, however, that comprehensive reports on various aspects of the field — for example, the published report "Principles of Color Sensitometry" — are considered very useful and desirable, and plans were made to further stimulate such activity. High-Speed A high priority was given Photography to the question of developing a dictionary of terms peculiar to high speed photography and a subcommittee headed by Morton Sultanoff was appointed to begin active work on this. The ASA Exposure Index also came up for discussion and it was considered highly desirable to extend film ratings to cover the range of exposures from a millisecond to a microsecond. This is no simple matter and the question was referred to ASA Sectional Committee PH2 for study and action. The meeting closed with Carlos Elmer accepting the responsibility of the highspeed photography papers program for the Spring Convention in Los Angeles. Meeting Reports For those who are interested in more detailed information concerning any of the above reported engineering committee meetings, a copy of the particular meeting report is available upon request. — Henry Kogel, Staff Engineer. 543