An intensity scale is an exposure measurement system in which the duration of exposure remains constant while the intensity of light is varied in regular increments, often referred to as "stops." This method helps photographers understand how changes in light intensity affect the final image.
Using an intensity scale is particularly useful in controlled studio or experimental photography, where precise exposure adjustments are needed. By understanding and applying this scale, photographers can achieve consistent exposures, control contrast, and fine-tune lighting to produce well-balanced and visually accurate photographs.