A dual-camera system consists of two camera lenses on a device, typically a smartphone. This setup allows for improved image quality and versatility in photography. One lens often captures standard images, while the other may specialize in wide-angle shots or depth sensing, enabling features like portrait mode. By using both lenses, a dual-camera can create a more detailed and dynamic image. It can also enhance low-light performance and provide better zoom capabilities. Overall, dual-camera technology enhances the photography experience for users of devices like the iPhone or Samsung Galaxy.