SMPTE ST 418M-2005 for Motion-Picture Film (65-mm) - Camera Aperture Image and Usage 8 70 Format.pdf

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1、 1 Scope 1.1 This standard specifies the dimensions of the camera aperture image and the relative positions of the vertical and horizontal centerlines of the intended image area with respect to the reference edge and the perforations of the camera negative film for 65-mm 8/70 motion-picture cameras.

2、 1.2 This standard also specifies the location of registration pins, the position of the emulsion and the normal frame rate. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the

3、 edition indicated was valid. All standards are subject to revision, and parties to agreement based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE 145-2004, Motion-Picture Film (65-mm) Perforated KS 3 Dimensi

4、ons 3.1 The dimensions shall be as specified in figure 1 and table 1. They shall apply to measurements of the images formed on freshly exposed and processed film. 3.2 The angle between the vertical edges of the aperture and the edge of normally positioned film shall be 90 1/2. 3.3 The angle between

5、the horizontal and vertical edges of the aperture shall be 90 1/2. 4 Perforations 4.1 Film intended for use according to this standard shall be perforated in accordance with SMPTE 145. 4.2 Perforation style shall be “short pitch”, i.e. 0.1866 inches or 4.74-mm pitch. 5 Camera usage 5.1 Emulsion posi

6、tion The emulsion side of the film shall be toward the camera lens. Page 1 of 2 pages SMPTE 418M-2005 Copyright 2005 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 ApprovedOctober 18, 2005SMPTE STANDARD for Motion-Picture Film (65-mm)

7、 Camera Aperture Image and Usage, 8/70 Format SMPTE 418M-2005 Page 2 of 2 pages 5.2 Frame rate The standard frame rate for this film format is 24 frames per second, although higher or lower rates may be used for effects or in other special situations. IMAGE-FORMING LIGHT RAYSSTRIKE FAR SIDE OF FILMV

8、IEW FROM BASE SIDE OF FILMFigure 1 Camera aperture area of film Table 1 Dimensions Dimensions Description Inches Millimeters A Camera aperture width 2.072 nom 52.63 nom B Camera aperture height 1.485 nom 37.72 nom C Registration perf to centerline 1.162 nom 29.51 nom D Reference edge to image .243 ref 6.17 ref E Reference edge to image 2.315 ref 58.80 ref F Image center to registration perforation .801 nom 20.35 nom G Frame line .008 max 0.20 max R Corner radius .030 max 0.76 max