A three-piece all-aspheric adapter fisheye lens includes a negative meniscus lens, a biconvex lens, and a biconcave lens positioned between the negative meniscus lens and the biconvex lens. The lenses are coaxial and are arranged with an exit pupil to cooperatively generate an image with a camera lens that has greater field of view than the camera lens alone when the exit pupil is coplanar and coaxial with an entrance pupil of the camera lens. Each lens has an aspheric object-side surface and an aspheric image-side surface.