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Ziliotto — Panoramic Motion Pictures 213
In passing, it may be of interest to note that, if in printing we reduce the dimensions so that we obtain a positive frame of the standard height which would therefore fill the standard screen, we still retain a panoramic effect, since we include an angle of about 52 degrees instead of an angle of 38 degrees, as with an ordinary camera having a 35 millimeter focus lens. This is due to the fact that our negative is 24 millimeters high instead of 18, and, in reducing it to this last figure we bring in the standard width a greater field.
We do not want to suggest any particular proportion for the frame, but only to state that, in our opinion, the present shape of the frame is not the best, as we naturally need a much wider vision horizontally than vertically.
I think I owe the members of this Society a word of explanation about the other machines used in connection with the system; these are the printing machine and the perforating machine.
The printing machine is composed of two mechanisms, one taking care of the negative and one of the positive. The negative film moves downward 5 holes at a time (remember that our negative frame is 24 millimeters high instead of 18) while the positive moves upward 4 holes. The inverted motion is necessary on account of the reducing lens interposed between the negative and the positive.
This machine was also built by Mr. Alberini and works well, although made with parts of various machines put together in a very temporary way.
The perforating machine is identical with the ordinary one, only it must be made to accommodate the wider film.
Neither of these machines is used directly by producers, but almost exclusively by motion picture laboratories and film manufacturers, so that few machines are really necessary.
I hope that I have succeeded in bringing to your attention the most prominent features of the panoramic motion picture system invented by Mr. Alberini.
I have devoted considerable time to the preparation of this paper and trust your body will find the matter of interest.
We shall welcome discussion and helpful connnent by the distinguished engineers here present. New York, Mav 12, 1924