1. An imaging apparatus comprising: a lens; an imaging device that detects light focused by the lens at a plurality of detection points; and an image processing unit that generates image data for displaying an image on a display screen having a predetermined area, on the basis of image signals detected at the detection points of the imaging device, wherein the image processing unit performs image processing to enlarge a section, which is a portion of the image captured by the imaging device, and displays the enlarged image on the display screen, and in the image processing, the enlargement ratio of a field angle varies depending on the place in the section.