A display apparatus (100, 200) comprising: an image forming optical system configured to form an image to be displayed; an eyepiece optical system configured to provide the image formed by the image forming optical system to a pupil of an observer; and an image shifting optical system (120, 320) disposed on an optical path between the image forming optical system and the eyepiece optical system, the image shifting optical system (120, 320) being configured to shift the image formed by the image forming optical system in a direction perpendicular to an optical axis, wherein the image shifting optical system (120, 320) comprises a first optical member (121, 321) having a first focal length (f A) and a second optical member (122, 322) having a second focal length (f B), and wherein a distance between the first optical member and the second optical member along the optical axis is equal to a sum of the first focal length and the second focal length, CHARACTERISED IN THAT the display apparatus further comprises: an eye tracker configured to track a position of the pupil of the observer; a controller configured to control a position of the image shifting optical system (120, 320) based on a change of the position of the pupil of the observer provided from the eye tracker; and an actuator configured to move the image shifting optical system (120, 320) in the direction perpendicular to the optical axis based on a control of the controller. an image forming optical system configured to form an image to be displayed; an eyepiece optical system configured to provide the image formed by the image forming optical system to a pupil of an observer; and an image shifting optical system (120, 320) disposed on an optical path between the image forming optical system and the eyepiece optical system, the image shifting optical system (120, 320) being configured to shift the image formed by the image forming optical system in a direction perpendicular to an optical axis, wherein the image shifting optical system (120, 320) comprises a first optical member (121, 321) having a first focal length (f A) and a second optical member (122, 322) having a second focal length (f B), and wherein a distance between the first optical member and the second optical member along the optical axis is equal to a sum of the first focal length and the second focal length, CHARACTERISED IN THAT the display apparatus further comprises: an eye tracker configured to track a position of the pupil of the observer; a controller configured to control a position of the image shifting optical system (120, 320) based on a change of the position of the pupil of the observer provided from the eye tracker; and an actuator configured to move the image shifting optical system (120, 320) in the direction perpendicular to the optical axis based on a control of the controller. an eye tracker configured to track a position of the pupil of the observer; a controller configured to control a position of the image shifting optical system (120, 320) based on a change of the position of the pupil of the observer provided from the eye tracker; and an actuator configured to move the image shifting optical system (120, 320) in the direction perpendicular to the optical axis based on a control of the controller.