... metallurgical microscope ,imaging clearly, wide field of vision J-300,The whole design accord with man-computer function, suitable ... ,with tensional adjustable by hands ,coarse focus:26mm,fine focus:0.002mm8)Condenser:NA1.25 abbe condenser with iris diaphragm,condenser ... )Illumination:Halogen Lamp,6V/20W,brightness adjustable10)Power:transformer,220V J-300 Inverted metallurgical microscope