Specification Achromatic objective: 4X, 10X, 40X (spring), 100X (spring, oil) Eyepiece: Large field of view eyepiece: WF10X, (WF16X optional) Observation head: Hinged binocular head Platform: Double-layer movable platform; platform size 115x125mm Focusing: Coaxial coarse and fine adjustment, focusing range 30mm, fine adjustment scale value 0.002mm Condenser: NA=1.25 Abbe condenser with variable diaphragm and color filter Lighting system: 220V/6V20W or 110V/6v20W halogen lamp (optional for LED lamp)