16:9 ratio refers to the measuring unit of a photo’s dimensions that can ensure a nice display of photos on a large screen, for example HDTV. 16:9 means that the image measurement has the ratio of sixteen pixels in width and nine pixels in height, so the width is 1.78 times of the height. You can see this ratio in HD movies more often than in still photo photography.
There are other typical aspect ratios available in a digital camera, including 3:2 and 4:3. For most digital models, you often work through the menu for the aspect ratio setting.
Also Called: Aspect Ratio