For the machining industry we offer visual and electronic autocollimators for measuring straightness, flatness, and positioning accuracy of index tables in the machine tool industry. For the optical industry we offer interferometers for shape testing, goniometers, goniometer-spectrometers, visual and electronic autocollimators, collimators, testing telescopes, diopter telescopes, focometer, prism binoculars, cameras, and zoom lenses.