Full-featured and LED-illuminated, G500 polarizing microscopes are designed with a round, 360° rotating stage, graduated in 1° increments, with filters for a full crystal visualization. G500s feature a unique combination system of a graduated iris diaphragm mounted in the condenser, paired with a graduated Koehler field iris built into the illuminator housing. These features, along with an intensity rheostat, allow for maximum illumination control. Polarization system consists of a 360° rotatable analyzer, 3 compensator plate sliders (gypsum, mica, and quartz), and a 90° swing-out intermediate tube analyzer.