J-300 inverted metallurgical microscope ,imaging clearly, wide field of vision J-300,The whole ... )Eyepieces:Wide field WF10X/18mm, WF12.5X15mm4)Objectives:Special use metallurgical objectives, flat-field achromatic objective lens 4X ,10X ,40X ,100X ... Lamp,6V/20W,brightness adjustable10)Power:transformer,220V J-300 Inverted metallurgical microscope