Roland Christen gives Dennis di Cicco an overview of Astro-Physics’s brand new 17-inch astrograph, the largest telescope offered by the renowned manufacturer of refractors, astrographs, and German equatorial mounts. He also explains some of the advanced features added to the company’s new GTOCP 4 control box that retrofits with all of the earlier Astro-Physics mounts having servo-motor drives.
