A neat feature of almost every modern digital camera is that every single photo you take includes detailed metadata, including all of the photo’s settings including shutter speed, aperture, sensitivity, and focal length. The focal length, or simply the “zoomness” of your photo is of particular interest. All of the other settings are very easy to change by adjusting a dial (or using some annoying menus), but this one can only really be adjusted in a large way by changing lenses.