An imaging system having a folded optical axis that is accomplished through the effect of a first lens group, a prism, and a second lens group wherein a second surface of the prism is a mirror wherein the folded imaging system exhibits a horizontal field of view (HFOV) greater than 160 degrees and a vertical field of view (VFOV) greater than 80 degrees. Further aspects include a conjugate ratio of the lenses to be substantially 5.47 and a ratio of the entire lens focal length to the focal length of the first lens to be substantially −0.309.