This International Standard specifies a method for assigning exposure index values, ISO speed ratings, and ISO speed latitude ratings to electronic still-picture cameras. The standard applies to both monochrome and colour electronic still-picture cameras.
ISO 12232:1998 history
2020ISO 12232:2019/Amd 1:2020 Photography — Digital still cameras — Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index — Amendment 1: Determination of encoding-relative
2019ISO 12232:2019 Photography — Digital still cameras — Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index — Amendment 1: Determination of encoding-relative
2006ISO 12232:2006 Photography - Digital still cameras - Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index
1998ISO 12232:1998 Photography - Electronic still-picture cameras - Determination of ISO speed