A convex mirror or diverging mirror is a reflecting mirror where the bulged side faces the light source. The reflection image gets smaller when the object is far away from the mirror, and gets larger when the object is nearer. When the object is closer to the mirror the image gets larger, when the object is far away from the mirror the image gets smaller. The distance between the object and the mirror is measured when the image appears clear upright. The focal length of the convex mirror is the distance between the mirror and the image sensor when the object is in focus. The Convex Mirror Equation Calculator calculator below helps you in finding the object distance for any convex mirror.