A convex mirror produces a virtual image, like a plane mirror, but the image is greatly reduced in size. Thus a convex mirror is often called a "wide angle" mirror, since it compresses a much larger angle of view into its frame than a flat mirror would.

With the appropriate sign conventions we can use the same basic expression, (1/p) + (1/q) = (1/f), just as we did for the concave mirror. R, f and q are taken as negative.