Part 2/8:
Before the digital era reigned supreme, photography relied heavily on film, which came in various sensitivities measured as ISO. A faster film, like ISO 800, was ideal for action shots and low-light conditions as it allowed for quicker shutter speeds, though at the cost of image graininess. In contrast, slower films such as ISO 50 or 100 delivered sharper images. Understanding the film's sensitivity is crucial as it determines how a camera processes exposure.