16-mm sound motion pictures, a manual for the professional and the amateur (1949-55)

Page scan 000403 from 16-mm sound motion pictures, a manual for the professional and the amateur

Record Details:

Title:
16-mm sound motion pictures, a manual for the professional and the amateur
Date:
1949-55
Publisher:
New York : Interscience Publishers, Inc.
Volume:
16-mm sound motion pictures : a manual for the professional and the amateur
Leaf #:
000403
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Date Added:
July 18, 2024
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STEP-CONTACT PRINTER 385 moves from one hole to the next while the film is being moved from one frame to the next at the point where a change in printing illumination is desired. The change occurs during the time when the shutter is closed between frames; there is no change in lamp output in the interim. Fig. 96. Schematic of light path in DeBrie step contact printer. The light change strip shown in Figure 104 may be used to transport a filter holder with special filters for color correction of individual scenes when the machine is used for color printing. (See Figs. 95 and 104.) ^NEUTRAL DENSITY FILTER TABLE OF PICTURE ILLUMINATION (Printing Lamp Rheostat Set at 108 Volts) Light change band hole number Light change Inches band hole size Mm Foot candles Lux 20 0.710 18.00 4180 45,000 19 0.603 15.30 3740 40,200 18 0.567 14.40 3335 35,900 17 0.530 13.45 2970 32,000 16 0.496 12.6 2660 28,600 15 0.482 12.25 2370 25,500 14 0.443 11.25 2120 22,800 13 0.418 10.60 1892 20,400 12 0.402 10.20 1690 18,200 11 0.382 9.70 1506 16,200 10 0.362 9.20 1347 14,500 9 0.335 8.50 1200 12,900 8 0.311 7.90 1072 11,550 7 0.299 7.60 958 10,300 6 0.290 7.35 855 9,200 5 0.272 6.90 762 8,200 4 0.260 6.60 683 7,350 3 0.248 6.30 608 6,550 2 0.236 6.00 543 5,850 1 0.224 5.70 485 5,220 Figure 96 is a schematic of the light path. This arrangement is convenient for the printing of integral tripack color films where changes in the color balance of particular scenes are desired. The latest DeBrie step contact printer is a three-color additive machine