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

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15.13" DIAM FROM FILM TO FILM. j" DIAM HOLE —0.13" Fig. 4. Rotating drum. TOP VIEW Fig. 5. Schematic diagram of optical system. P.... Projection Lamp, GE 750T12P G . . . Ground-Glass Plate, 2 in. X 3 in. S... .Slit, 0.001 in. X | in. K. . .Knife Edges on bars M. . .Mirror, first-surface set at 45° to axis of lens arrangement F . . . . Film, Kodak Linagraph Panchromatic LP421 LI. . .Condensing Lens, 6in. //1, 4 ^in.diam L2 ... Projection Lens, 75mm //I, 49mm diam coated achromat L3. . .Piano Convex Field Lens, 17 in. //I, 3^ in. diam L4. . .Piano Convex Field Lens, 21 in. //I, 3^ in. diam L6. . .Camera Lens, Color Skopar// 3.5, 105 mm //I Muster and Volterra: Use of a Rotating-Drum Camera 47