1. A mobile terminal, comprising: a first image capturing unit having a first focal length; a second image capturing unit having a second focal length, the second focal length being different from the first focal length; a display unit; and a controller configured to: acquire, using the first image capturing unit, a first image, control the display unit to display a first image along with an icon, and in response to receiving a user selection of the icon displayed on the display unit, control the display unit to display a reduced image of a first image centered on and overlapping a second image acquired by the second image capturing unit while the first image capturing unit acquires a first image, wherein the reduced image is reduced in size from a first image acquired by the first image capturing unit.