By default, the Sony Xperia Z2 takes images at an aspect ratio of 16:9. But since the sensor's native aspect ratio is 4:3, it makes some sense to take photos in that proportion instead. Note how extra vertical space is captured in a 4:3 photo (resolution of 3264 x 2448), while the 16:9 option (resolution of 3840 x 2160) crops out 30% of the vertical image area. To switch between aspect ratios, just open the camera settings menu – it is the very first option on the list.