This instrument is an enhanced version of our popular Intermediate Spectrometer. Its larger 30mm diameter optics give brighter line images and make precise measurements easier. The optical focusing system has also been refined and the instrument retains the same premium features as the earlier version, including the built-in illuminated auto-collimator for fast set up, 17.8cm diameter divended circle, double ended vernier reading to 1' resolution, and 7cm diameter rotatable and height-adjusting prism table to accommodate various accessories. The spectrometer is supplied with a 300lines/mm diffraction grating and grating holder, high quality prism, illuminated magnifier, auto-collimation mirrorwith a power supply for 110VAC, and an instruction manual.