For Digital Magnifier implementation method and mobile devices

A type of digital magnifier implemented method and mobile devices, the method comprising: mobile devices for detecting user input camera start command; mobile devices in response to the camera start command, activating the camera for scene preview; and mobile devices to the camera the current lens focal length is adjusted to the shortest focal length of the lens of the camera support. Implemented by embodiments of the invention, accurate focusing can be realized in the process of the camera phone apparatus close to the scene to obtain an amplified effect in the scene preview, preview the scene to obtain a clear picture.