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 or telephoto shots, enabling users to take a variety of photos with different perspectives. Additionally, dual-camera systems can enhance features like depth perception, which helps create a blurred background effect known as bokeh. This effect is popular in portrait photography, making the subject stand out. Overall, dual-camera systems provide users with more creative options and better overall performance in capturing images.