इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 10912 (1992): Photography - Roll film cameras - Back window location an picture sizes [MED 32: Photographic Equipment] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” SI 10912 : 1992 IS0 1203 : 1984 ( TFh+~ ) TIF- Indian Standard YHPARGOTOHP - ROLL MLIF CAMERAS - BACK WINDOW NOITACOL AND PICTURE SEZIS ( First Revision ) UDC 771’313’2 : 771’33 : 77’068 @BlS 1992 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 March 1992 Price Group 2 is 10912 : 1992 IS0 1203 : 1984 Indian Standard YHPARGOTOHP - ROLL MLIF CAMERAS - BACK WINDOW NOITACOL AND PICTURE SEZIS ( First Revision ) NATIONAL FOREWORD This Indian Standard, which is .identical with IS0 1203 : 1984 ‘Photography - Roll film cameras - Back window location and picture sizes’, issued by the International Organization for Standardization ( IS0 ), was adopted by the Bureau of Indian Standards on the recommenda- tions of the Photographic Equipment Sectional Committee ( LMD 24 ) and approval of the Light Mechanical Engineering Division Council. The original version of this standard, IS 10912 : 1984 ‘Back window location and picture sizes in roll film photographic cameras’ was based on IS0 1203-1974 ‘Photography - Roll film cameras - Back window location and picture sizes’, issued by the lnternation,al Organization for Standardization ( IS0 ). Harmonization of the standard with International Standard has been made by the adoption of IS0 1203 : 1984. In the adopted standard, certain terminology and conventions are not identical with those used in Indian Standards; attention is especially drawn to the following: a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’. b) Comma ( , ) has been used as a decimal marker while in Indian Standards the current practice is to use a point ( . ) as the decimal marker. As in the Original Standard, this Page is Intentionally Left Blank SI 10912 : 1992 IS0 1203 : 1984 1 Scope and field of application This International Standard specifies the location of back.windows of roll film cameras in relation to the number of exposures and film sizes they are designed to accommodate and specifies the picture sizes produced. 2 Back window location The locating dimensions shown in the figure are given in table 1. 3 Picture sizes The picture sizes corresponding to the nominal roll film negative sizes are given in table 2. IS 1091’2 : 2991 ISO1203:1984 + 3 g @-_ - 1 B T z i k-C-ent rel ine Centre line of aperture of spool Figure - Location of back window Table 1 - Locating dimensions for back window Trade designation of Exposures per roll - X Y nominal negative size Film size cm in mm in mm in 4 x4 1 518 X 1 5/E 12 - 127 0 0 - 14,0 -0.55 4 x 6,5 1 518 x 2 l/2 8- 127 0 0 0 0 4,5 x 6 1518 x 2 114 16 - 120 and 620 0 0 + la.0 +0.71 6 x.6 2 l/4 x 2 l/4 12 - 120 and 620 0 0 0 0 6 x9 21/4x 3114 8- 12Oand620 +35,5 +1.40 - 19,5 -0.77 NOTES 1 The tolerances for dimensions X and Y are & 1.6 mm t + 0.06 in) 2 The diameter of the back window is 9.0 mm (0.35 in) minimum. 3 Two back window openings are required for 127 film-size cameras intended for 3 cm x 4 cm format. Table 2 - Roll film pidture sizes Picture size Trade designation of Exposures per roll - corner radius nominal negative size width length Film size lmex.) cm in mm ,in mm in mm in 4 x4 1 518 X 1 5/E 12 - 127 41‘3 1.625 41.3 1.625 0,4 0.016 4 x 6.5 15/E X 2 112 8 - 127 41,3 1.625 63,5 2.500 64 0.016 4.5 x 6 1 518 x 2 l/4 16 - 120 and 620 41.5 1.634 56,0 2.206 0,a 0.031 6 x6 2 l/4 x 2 l/4 12 - 120 and 620 56,O 2.205 56,0 2.205 0.8 0.031 ’ 6 x7 2114 x 2314 10 - 120 and 620 56.0 2.205 69.0 2.717 0.8 0.031 6 x9 2 l/4 x 3 t/4 8 - 120 and 620 560 2.205 62.6 3.250 0,8 0.031 NOTES 1 In the case of rectangular formats, the width is the shorter dimension. ( + 2 The tolerance for 127 film sizes is f 0,5 mm 0.020 in). 3 The tolerance for the 120 and 620 film sizes is * 1.0 mm ( +_ 0.040 in). 4 In the case of cameras with interchangeable lenses, the picture size given in table 2 applies to the picture taken by the standard lens. 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