As part of the new version of DIN 4512 in 1961, the assignment of film speeds to then-new ASA standard ASA PH2.5-1960 from the year before was obsolete. The DIN-grade have now - as before the ASA numbers - usually raised by an entire exposure level, ie a black and white negative film that was previously specified with 21 ° DIN got now without emulsion change a nominal sensitivity of 24 ° DIN. The film and photographic industry moved in this regard partly after being delayed, which for several years caused considerable confusion among users. Strictly speaking, only applies from that date until today wiederzufindende in the ISO equivalent of 12 ° DIN = 12 ASA = ISO 12/12 °, 21 ° DIN = 100 ASA = ISO 100/21 ° and 30 ° DIN = 800 ASA = ISO 800/30 °. From 1961 to the level character can be omitted when specifying DIN grades, example: 21 DIN instead of the previous 21 ° DIN, which, however, has only implemented in part because the later logarithmic ISO values the better distinguish half still with degree sign written.
The DIN method for susceptibility testing was initially used only for black and white negative films, but not for color negative films and color or black & white reversal film. So that users could still work with the standard light meters, the manufacturer of such materials spoke thus assuming subjects with average luminance distribution expose its own recommendations to the kind of "how Canon EOS 5D Mark II ... DIN from ". In the further development of this standard, the content has been greatly expanded and divided into nine parts 1 and 3 new and 10: DIN 4512-1:1971-04 concerned black and white negative films, and his latest edition of DIN 4512-1:1993-05 in September 2000 replaced by ISO 6:1996-02. DIN 4512-4:1977-06 treated color reversal films, the latest edition of DIN 4512-4:1985-08 was replaced in July 2002 by ISO 2240:1998-06. DIN 4512-5:1977-10 treated color negative films, the latest edition of DIN 4512-5:1990-11 was also replaced in July 2002 by ISO 5800:1998-06.