J-300 inverted metallurgical microscope ,imaging clearly, wide field of vision J-300,The whole ... , WF12.5X15mm4)Objectives:Special use metallurgical objectives, flat-field achromatic objective lens 4X ,10X ,40X ,100X(oil)5)Changer: quadripuntal6)Working stage:Double ... /20W,brightness adjustable10)Power:transformer,220V J-300 Inverted metallurgical microscope