A display calibration apparatus may include a display mounting assembly with a mounting platform and a multi-axis positioning device coupled to the mounting platform for adjusting an orientation of the mounting platform. The display calibration apparatus may also include a camera device positioned to receive light emitted by a plurality of sub-pixels of a display mounted on the mounting platform. The camera device may include an image sensor array that captures light emitted by the plurality of sub-pixels of the display. In addition, the display calibration apparatus may include a camera lens and a focuser. The camera lens may be positioned to direct light emitted by the plurality of sub-pixels of the display onto the image sensor array of the camera device, and the focuser may be disposed between the camera device and the camera lens to move the camera lens axially along an optical axis of the camera lens.