1、SMPTE 181-2001 Revision of ANSI/SMPTE 181-1996 SMPTE STANDARD for Motion-Picture Film (8-mm Type S) - 16-mm Film Perforated 8-mm Type S (1-3) - Printed Areas 1 Scope This standard specifies the location and size of the 8-mm type S printed picture areas for negative/posi- tive and reversal printing o
2、n 16-mm motion-picture film perforated 8-mm type S, 2R-1667 and 2R-1664 in row positions 1 and 3. 2 Dimensions 2.1 The dimensions shall be as given in figure 1 and table 1. 2.2 Dimensions A, B, and H apply to all images. The differences in values from the reference perforation, dimensions B through
3、F, establish the minimum area to be printed. For conven- ience, and to avoid unnecessary addition and subtraction in applying this standard, a refer- ence dimension of 0.311 in (7.90 mm) from the positioning perforation is suggested. NOTES 1 The reduction ratio of prints made from 16-mm negatives Pa
4、ge 1 of 3 pages or reversal originals shall be approximately 1.8:l. The correct ratio is controlled by dimensions C through F. 2 The vertical dimension B of the reduced 8-mm type S image of the original camera aperture image should be nominally centered on the horizontal centerline of the per- forat
5、ion although the exact location will be determined by dimension H and its tolerance. 3 The direction of film travel shown in figure 1 is to aid in illustrating the minus-2 perforation and is the direction of motion in the projector for the resulting 8-mm print if figure 1 is as seen from the light s
6、ource of a projector used for direct front projection. 4 If photographic audio is to be applied to the print, it is necessary to consider the required compatibility between this standard and the strong trade preference that a clear septum not appear between the edge of the printed picture and the ed
7、ge of the printed track. This standard allows overlap (double) printing of adjacent areas of the printed picture and printed track without permitting undesirable incursions of one area into the unrestricted area of the other. A suggested value of 0.0015 in (0.038 mm) more than minimum may be used. C
8、opyright O 2001 by THE SOCIETY OF MOTION PICTURE ANDTELEVISION ENGINEERS 595 W. HaMale Ave., Whb Plains. NY 10607 (914) 761-1100 ApPrOVd June 6,2001 SMPTE 181 -2001 TRAVEL 1 ROW 3 Row I REFERENCE: EDGE O H A *o- O Figure 1 - Dimensions Table 1 - Specifications Dimensions Inches Millimeters A 0.228 r
9、ef 5.79 ref B 0.163 min 4.14 min C 0.058 rnax D 1 0.282 min 1.47 max 7.16 min , E 0.372 max 9.45 max F) 0.596 min 15.14 min H2) 0.393 I 0.002 9.98 f 0.05 R 0.005 max 0.13 max )See note 4. 2)See note 3 and annex A.1. Page 2 of 3 pages SMPTE 181-2001 Annex A (informative) Additional data A.l If prints
10、 are made with a step printer, the registration device should be in the minus-2 perforation, or that perfo- ration which corresponds to the minus-:! perforation, when the final print stage is reached, to obtain maximum benefit of cancellation as films are projected in accordance with ANSIISMPTE 154,
11、 which specifies the minus-2 position for projected films. A.2 The parenthetical numerals have been added to the title of this standard to specify how the rows of perforations are placed on the film. This designation is necessary only when the film stock is wider than its end use and more than one c
12、ombination of perforation rows is possible. The perforation rows are numbered starting at the reference edge , which is the edge nearest to that row of perforations which is retained in the slitting operation. The row of perforations which is discarded is given the number O. Negative or intermediate
13、 films which are not slit may contain a O-numbered row of perforations if that perforated row corresponds to the dis- card row of perforations on the subsequent print stock. Annex B (informative) Bibliography ANSIISMPTE 151-1998, Motion-Picture Film (8-mm Type S) - 16-mm Film Perforated 8-mm Type C, (1 -3) ANWSMPTE 154-1 998, Motion-Picture Film (8-mm Type S) - Projectable Image Area and Projector Usage SMPTE 157-1999, Motion-Picture Film (8-mm Type S) - Camera Aperture Image and Usage Page 3 of 3 pages
