Archived posting to the Leica Users Group, 2011/06/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I would guess 1960, in the 1938 (HP2) entry on http://www.photomemorabilia.co.uk/Ilford/Chronology.html it mentions "the film was rated at 125ASA (equivalent to a 250ASA emulsion after the 1960 'universal' speed rating revision" john ________________________________________ Both sites cite the change of HP3 and or HP4 from 200 to 400 without citing the exact date this happens. Mark This photography-related LUG email is a stub. You can help Rabopedia by expanding it.