How does a faster film speed affect photography?

A faster film speed, indicated by a higher ISO rating, allows photographers to capture images with greater sensitivity to light. This means that the film can record an image using less light, which is particularly useful in low-light conditions or when capturing fast-moving subjects.

When photographing subjects in motion, such as athletes or wildlife, a faster film speed helps to reduce the risk of motion blur. Because the film requires less light, it can also utilize shorter exposure times. This shorter duration can freeze motion more effectively, capturing the subject in sharper detail.

In contrast, higher resolution is typically associated with the quality of the film or digital sensor rather than the film speed itself. Increasing exposure time is contrary to the benefit of faster film, and lower sensitivity to light is characteristic of slower film speeds, not faster ones. Thus, the advantage of faster film speed lies in its ability to better capture dynamic subjects and challenging lighting situations.