A method for the rapid design of thin-lens cemented doublets for any primary aberration targets and based on a set of precomputed graphs is described. In effect, a modified and normalized version of the quintic expression in power distribution used by earlier workers is evaluated for a mesh over the whole spread of doublet solution space, and the results displayed in isometric plot form. The graphs not only permit aberration compromising near the target values, but also provide a direct indication of the practical acceptability of the solutions based on the steepness of the surface curvature involved. Two simple examples are presented.