autofocus systems

Autofocus systems help cameras automatically adjust their lens to produce sharp images. They use sensors to determine whether the subject is in focus by measuring contrast or distance, then move the lens accordingly. There are two main types: contrast-detection, which analyzes image sharpness directly, and phase-detection, which quickly assesses focus by comparing light paths. Modern cameras often combine these methods for faster, more accurate focus. Autofocus is essential for capturing clear photos without manual adjustments, especially in dynamic or unpredictable scenes.