The present invention relates to a terminal and a method of controlling therefor. According to one embodiment of the present invention, a terminal includes at least two or more camera sensors, a preview window configured to include a first object to which a first focus is set by a first camera sensor and a second object to which a second focus is set by a second camera sensor and a display configured to display a processed image data, and a controller configured to track a movement of the first object, the controller, if the first object is deviated from an angle of view covered by the first camera sensor, configured to set a focus to the first object using the second camera sensor, the controller configured to obtain image data.