SMPTE ST 195-2000 Motion-Picture Film (35-mm) - Motion-Picture Prints - Projectable Image Area.pdf

1、STDmSMPTE 175-ENGL 2000 6357qOL 0004121 847 SMPTE STANDARD for Motion-Picture Film (35-mm) - Motion-Picture Prints - Projectable Image Area SMPTE 195-2000 Revision of ANSISMPTE 195-1993 1 Scope Page 1 of 3 pages -Style A: General theatrical release prints commonly referred to as nonanamotphic or wid

2、e screen; 1.1 This standard specifies the maximum dimen- sions of the film image area intended for projet- tion from a 35-mm motion-picture film and the placement of this area relative to the perfora- tions and the reference edge of the film. 1.2 This standard specifies three types of image areas in

3、tended for theatrical projection (see A.4): - Style B: Theatrical release prints with an anarnor- phicimage; - Style C: Classic theatrical prints. 2 Dimensions The dimensions shall be as given in figure 1 and table 1. REFERENCE EDGE FILM IMAGE AREA I Q INTENDED J - ,I o PRO J ECTABLE I o I A IMAGE A

4、REA K IMAGE AREA DIRECTION _-_- - - E INTENDED IMAGE AREA View as seen through film toward lens Figure 1 - Projectable image area Copyright 8 2oW by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Hartsdale Ave White Plains, NY 10607 (914) 761-1100 Approved May 30,2000 STDaSMPTE L95-EN

5、GL 2000 8357401, 00041r22 783 H SMPTE 195-2000 Dimensions A B (style A) B (style B) B (style C) C D E F=H J=K *See A.l. NOTES Table 1 - Dimensions Inches 0.825 nom 0.446 min 0.500 rnax 0.690 max 0.602 nom 0.738 ref 0.324 min 1.151 max within 0.012 nominally equal Millimeters 20.96 nom 11.33 min 12.7

6、0 max 17.53 max 15.29 nom 18.75 ref 8.23 min 29.24 max within 0.30 nominallv eaual 1 Projector aperture Dimensions B, D, and E define the image area on the film that is available for projection. They do not define the opening in the projection aperture plate. The size of this opening may differ from

7、 dimensions A and B, for example, because of the physical separation necessary between the aperture plate and the film to avoid scratching the film, the slant of the marginal rays accepted by the projection lens, etc. 2 Actual projected area It is recognized that, in many cases, the actual film imag

8、e area that is projected may be smaller than the Annex A (informative) General information Al Centerlines The centerlines of the image area are given for convenience in interpreting the standard, facilitating such applications as the optical design of equipment, and assisting in the under- standing

9、of suitable mechanical embodiments related to projectable image area. Note that the centerline of the projectable image area is displaced from the centerline of the film by 0.050 in (1.27 mm) nominal. A.2 Related standards SMPTE 59 and ANSVCMPTE 11 1 define image areas for other important phases of

10、motion-picture operations and are projectable maximum and, in some cases, may be nonrec- tangular (for example, an irregular four-sided figure bound by either straight or curved lines). Such departures may recuit from equipment considerations, such as slight incon- sistencies among lenses, screen si

11、zes, etc.; from geometric limitations such as the screen surface being at an angle other than 90“ from the projection axis, or being nonplanar or both; and from aesthetic considerations such as pictorial composition within more restrictive image limits. In the ab- sence of specific instructions to t

12、he contrary, it is intended that the actual projected film image area be the largest appropriately-shaped figure that can be inscribed within the specified dimensions. consistent with this standard and with one another under currently acceptable commercial practices. A3 Image area for televlslon It

13、is recognized that home television receivers are adjusted to show a distribution of picture sizes ranging downward from the maximum. Guides to picture composition, based upon a statistical survey of receivers in use, are presented in CMPTE RP 27.3. Note that some portion of the audience will see the

14、 entire transmitted area, but for certainty in presentation of critical information over broadcast televi- sion, such information should be confined to a smaller, central area. Page 2 of 3 pages STD.SMPTE 195-ENGL 2000 8357401 0004323 bLT = SMPTE 195-2000 A.4 Typlcal aspect ratios for nonanamorphlc

15、theatrical pro- jection For aesthetic and practical reasons, theatrical projection may present 35-mm images in such a manner that the full width of the projectable area is shown but the projected height is less than maximum. Photography designed primar- ily for theatrical exhibition recognizes this

16、and is composed for the more elongated rectangles. Several aspect ratios for the final projected picture are recognized through usage (see table A.l). Table A.l - Nonanamorphic aspect ratios the duplicate negative used for release printing of theatrical prints. A hard matte with an image height of a

17、t least 0.505 in (12.83 rnm) may be used for all style A aspect ratios (1.66:l or greater). Note that prints intended for a style C aspect ratio (1.37:l) will normally have an image height of at least 0.630 in (16.00 mm) as specified in SMPTE 59. In all cases, the framelines on the print shall essen

18、tially be opaque. It is recommended that pictures designed to be shown at aspect ratios other than those specified in this standard be so marked in a conspicuous manner. The television leader (described in SMPTE 55) provides for aspect ratio identifi- cation on frames 6-10. Projectable image height

19、Style Aspect ratio Inches Millimeters AS Image area on origlnal negative Use of camera aperture dimensions other than those stated 0.446 min 11.33 min in SMPTE 59 is discouraged. Film users are reminded that 0.497 ref 12.62 ref many features composed for wide-screen aspect ratio will be shown later

20、on television. Use of a hard matte in the 0.602 nom 15.29 nom camera will require substantial cropping of the film horizon- tally when the film is transferred to television, and severely limits the use of a print made from the negative. Good practice dictates using the 1.37:l style A camera aperture

21、 of SMPTE 59, while composing for the desired theatrical projection aspect ratio. Care should be taken to exclude extraneous items or action from the photographed image area which may show in the television scanned area. In every case, it is intended that the projected area be located symmetrically

22、about the horizontal centerline of the maximum projectable area. To help ensure correct vertical centering (framing) of the projected image, hard-matte printing may be used in producing Annex B (informative) Bibliography ANSIISMPTE 11 1-1996, Motion-Picture Film (35-rnrn) - Prints Made on Continuous

23、 Contact Printers - Exposed Areas for Picture and Audio SMPTE 55-2000, Motion-Picture Film - 35- and 16-mm Audio Release Prints - Leaders and Cue Marks SMPTE 59-1998, Motion-Picture Film (35-mm) - Camera Aperture Images and Usage SMPTE RP 27.3-1989, Specifications for Safe Action and Safe Title Areas Test Pattern for Television Systems Page 3 of 3 pages