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ANSI SMPTE ST 201M-1996 Motion-Picture Film (16-mm) - Type W Camera Aperture Image.pdf

1、 SMPTE 20LM b m 8357403 0002327 242 m SMPTE STANDARD ANWSMPTE 201 M-I 996 Revision of ANSVSMPTE 201 M-1992 for Motion-Picture Film (1 6-mm)- Type W Camera Aperture Image Page 1 of 4 pages 1 Scope 1.1 This standard specifies the dimensions of the image area produced by type W camera aperture on 16-mm

2、 motion-picture film intended for enlargement to nonanamorphic 35-mm motion-picture film with an aspect ratio of 1.66:l or greater. It also specifies the position of the image relative to the reference edge of the film and to the perforations. 1.2 This standard further specifies the dimen- sions and

3、 location of the enlarged image area on 35-mm internegatives or duplicate negatives and the enlargement ratio in optical printing from 16-mm type W originals. 2 Dimensions 2.1 The dimensions of the 16-mm type W aper- ture image shall be as given in figure 1 and table 1, and shall apply to the measur

4、ements of the aperture image as formed on freshly exposed and processed film. 2.2 The angle between the vertical edges of the aperture image and the reference edge of the film shall be 0“ I Mo. 3 35-mm internegatives and duplicate negatives The enlargement ratio for printing 35-mm inter- negatives a

5、nd duplicate negatives shall be 1.778:l. The dimensions and location of the image area on 35-mm internegatives and 35-mm duplicate negatives shall be as shown in figure 2 and table 2. CAUTION NOTICE: This Standard may be revised or withdrawn at any time. The procedures of the Standard Developer requ

6、ire that action be taken lo reaffirm, revise, or withdraw this standard no later than five years from the date of publication. Purchasers of slandards may receive current information on all standards by calling or writing the Standard Developer. Printed in USA. - American National Standard Copyright

7、 O 1996 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave., White Plains, NY 10607 (914) 761-1100 Approved April 8,1996 SMPTE 2011 96 8357403 CI002329 O15 Center of ANSUSMPTE 201 M-1996 t FILM AS SEEN FROM INSIDE CAMERA LOOKING TOWARD CAMERA LENS: EMULSION AWAY FROM OBSE

8、RVER Figure 2 - Image area on 35-mm internegative or duplicate negative Table 2 - Specifications Dimensions Mil li met ers Inches Al 21.95 nom 0.864 nom B1 13.19 - o C1 18.75 ref 0.738 ref Dl 7.80 max 0.307 rnax El 29.74 min 1.171 min R1 0.25 max 0.010 max + 0.010 0.519 - o + 0.27 Ji= Ki Annex A (in

9、formative) General information A.l If the aperture plate is not in the plane of the emulsion, the physical dimensions of the aperture in the camera will be slightly different from the dimensions given in the figures. The exact amount of this difference will depend upon the f value and the focal leng

10、th of the camera lens used, and upon the distance between the emulsion and the physical aperture. This separation should be no greater than is nec- essary to prevent scratching of the film. A2 It is the intent of this standard to provide a camera image such that the exposed area will always be large

11、r than the area of the printer aperture. A.3 The centerline of the intended type W camera image is given for convenience in interpreting the standard, facilitating such applications as the optical design of equipment and assisting in the understanding of suitable mechanical embodi- ments related to

12、the camera aperture image area. Note that the nominal centerline of the 16-mm image area is displaced from the centerline of the film by 1 .O25 mm (0.0404 in). Page 3 of 4 pages _ SMPTE 201M b = 8357403 0002330 837 W ANSVCMPTE 201M-1996 Annex B (informative) Equivalent projectable image areas While

13、it is clearly understood that type W 16-mm camera images are not intended for release print projection, it is often necessary to determine the area of the type W 16-mm image which is equivalent to the area that will be used for Such uses might be for screening of dailies or for viewing on editing eq

14、uipment, etc. Table 8.1 lists these equivalent areas. The center of these areas is coincident with the center of the aperture image area given in figure 1 and table 1. release print projection after enlargement of the image. Table B.l - Equivalent projection areas of type W 16-mm camera image Intended release Millimeters Inches projection format Width Height Width Height 1.66:l 11.80 7.10 0.464 0.280 1.85:l 11.80 6.38 0.464 0.251 Page 4 of 4 pages

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