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Photography - Apertures and related properties pertaining to photographic lenses - Designations and measurements
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Complete Current Edition:
3RD EDITION - DESIGNATIONS & MEASUREMENTS - March 15, 2008
Obsolete Revision Information:
2ND EDITION CORRIGENDUM 1 - TECHNICAL CORRIGENDUM 1 FOR 2ND EDITION - Oct. 1, 2006
2ND EDITION - DESIGNATIONS & MEASUREMENTS - Dec. 15, 1996
1ST EDITION - PHOTOGRAPHY - STILL CAMERAS - - Sept. 1, 1973