A single focus lens formed of only two lens groups, both of positive refractive power, with each lens group being formed of only a single lens. The lens of the first lens group has at least one of its surfaces aspherical, and the lens element of the second lens group has at least one of its surfaces aspherical and is convex on the object side. In addition, the following conditions are satisfied in order to provide a single focus lens suitable for use in a highly portable, compact camera, such as a digital camera: &ugr;d2>50 |f/f1|