1、 SUPTE RP*32 95 83574011 O002093 278 SMPTE RECOMMENDED PRACTICE Specifications for 8-mm Type S Test Film for Projectors and Printers RP 32-1 995 Revision of RP 32-1991 1 Scope This practice specifies the content and dimensions of an 8-mm type S test film useful in checking the per- formance of motio
2、n-picture projectors and printers. Its use is described in annex A. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this practice. At the time of publication, the editions indicated were valid. All standards are subjec
3、t to revision, and parties to agreements based on this practice are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. Page 1 ot 3 pages ANSVSMPTE 154-1993, Motion-Picture Film (8-mm Type S) - Projectable Image Area and Projector Usage ANS
4、VSMPTE 157-1994, Motion-Picture Film (8-mm Type S) - Camera Aperture Image and Usage ANSVSMPTE 168-1991, Motion-Picture Film (1 if the ghost is below the blocks, the shutter opens early. A.6 Framing accommodation The longer lines of the group of lines at the top and bottom of the vertical aperture c
5、enterline are 0.005 in (0.13 mm) apart. By centering the aperture and framing above and below, the range of framing is determined. The height of each travel ghost block is 0.007 in (0.18 mm). This permits the extent of framing to be measured beyond the limits of the dimensional lines. A.7 Resolution
6、 Resolving power in lines per millimeter can be read directly from the test target to the limit permitted by the film stock used. The ratio of line spacings of adjacent resolution pat- terns is equal to 10 1/10 (Le., the logarithm to the base 10 of the ratio of adjacent line spacings is 0.10). A.8 F
7、ield flatness Side-to-side out-of-focus is determined from the difference in softness of the as at the sides. Quantitative differences can be determined from resolution charts. Pie charts at the middle of the field permit quick focus adjustment and detec- tion of in- and out-of-focus effects. A.9 St
8、riping The user may apply magnetic record and balance stripes to this film by post-process means. If this is done, the dimen- sions of the film image should be checked to determine if change has been produced by the striping process. It is anticipated that striping will not significantly affect the
9、per- formance of the test film. However, the user is cautioned that the proximity of the film image to the limiting aperture may be altered due to striping thickness. Also, the frictional characteristics of the test film may be changed, which could affect film transport in the users apparatus. Page 3 of 3 pages
