Including standard output sensitivity, and recommended exposure index
|Standard:||ISO 12232 — Photography— Electronic still picture imaging — Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index|
|Technical Committee:||ISO/TC 42 Photography|
ISO Sensitivity (or ISO speed) is a measure of how strongly an image sensor and/or camera responds to light. The higher the sensitivity, the less light (smaller aperture and/or shorter exposure time) required to capture a good quality image.
Imatest calculates Saturation-based Sensitivity Ssat from a tonal chart after measuring and inputting the incident lux level with an illuminance meter.
See our documentation page ISO Sensitivity and Exposure Index for details.