Diagonal Telescope

Apochromatic refractors due to their unobstructed, text-book like diffraction patterns produce the sharpest, highest quality optical imaging available bar-none, aperture for aperture, of any telescope optical system. These breathtakingly pristine celestial views are coveted by experienced amateur astronomers. While the cost is expensive compared to a Newtonian reflector of similar aperture, during those cherished moments [...]