Transactions of the Society of Motion Picture Engineers (1924)

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ZilioUo — Panoramic Motion Pictures 209 All pictures are taken from the same station, but the angle included is respectively: 38-52 and 65 degrees. d. Is the same as c, that is, it includes an angle of 65 degrees. e and f. Represent pictures including an angle of 90 degrees. The pictures on the left side show screen frames obtained using the same projecting lens in the projector. The pictures on the right side show screen frames obtained either by using a lens of greater enlarging power so as to keep the height of the frame constant irrespective of the height of the positive film '.^^ Fig. 2 frame, which becomes less at wider angles, or by using a positive film of the same width as the negative. Compare relative field covered by matting down any one of the pictures on the right side to the side and shape, although a includes size of frame (a). Note that frame (a) and frame (b) have same 38 degrees, and b 52 degrees. For large theatres and special productions it may eventually be found convenient to use a special projector, a larger screen and a positive of the same width as the negative. This, however, is a