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This system comes with an eye-piece on a single lens graticule, which is provided in the eye-piece holding tube of the Optical Comparator. The optics of the comparator is provided with a rack and pinion movement to focus the test specimen accurately. Proper illumination is provided by means of a Plano-convex lens, reflector, graduated external scale and base. A plunger is provided for the specimen. This system has a Magnification 50x (eye-piece 10x X Object lens 5x). 6volts DC power supply is provided for the halogen illuminator by means of a step-down transformer.