An autofocus system is a technology used in cameras to automatically adjust the lens to focus on a subject. This system helps photographers capture sharp images without needing to manually adjust the focus. Autofocus can be particularly useful in dynamic situations, such as when photographing moving subjects or in low-light conditions. There are different types of autofocus systems, including phase detection and contrast detection. Phase detection is faster and commonly found in digital single-lens reflex (DSLR) cameras, while contrast detection is often used in mirrorless cameras and smartphones. Both systems aim to enhance the clarity and quality of photographs.