Active autofocus refers to a feature in cameras that allows for automatic focusing of objects in motion. This technology uses a variety of methods, such as phase detection or contrast detection, to ensure that the subject in the frame is always in sharp focus, no matter how fast it is moving. Some synonyms for active autofocus include continuous autofocus, predictive autofocus, and AI-powered autofocus. Other terms that can be used to describe similar features include dynamic autofocus, real-time autofocus, and motion tracking autofocus. The use of active autofocus technology has become increasingly important for photographers and videographers alike, especially when capturing fast-paced action such as sports or wildlife.