In a reflector dish, a small quantity of elongate mirror-surfaced reflector panels are structurally integrated with a support framework that is configured to enable convenient shipping and on-site assembly and erection of a reflector dish assembly with an effective reflecting surface that closely approximates a desired parabolic dish shape with short focal length, synthesized from combination of the reflector panels originally procured as flat rectangular sheet metal panels and formed to provide the desired dish curvature. The panels can be conveniently shipped to location along with a corresponding quantity of reinforced crescent-shaped support frames to which the panels are made to attach as structural elements, by novel attachment hardware, for erection at the operational site.