5X- 100X Metallographic Microscope Long Working Distance Infinity Objective Lens

  
2.5X 5X 10X 20X 50X 100X Metallographic Infinity Objective Long Working Distance Flat Achromatic Microscope Objective Lens. Material: Metal Thread Interface: RMS 20.32 mm Magnification: 2.5X / 5X / 10X / 20X / 50X / 100X NA: 0.08 / 0.12 / 0.25 / 0.40 / 0.55 / 0.8 WD: 11.2 mm / 23.6 mm / 17.7 mm / 10.4 mm / 7.0 mm / 3.2 mm Focal length: 72 mm / 40 mm / 20 m / 10 mm / 4 mm / 2 mm Resolution: 4.1? M Depth of focus: 42.96? M Field of View on Object: 8.8 mm / 4.4 mm / 2.2 mm / 1.1 mm / 0.44 mm / 0.22 mm Field of View on image: 25 mm Screw: 4/5X136(RMS). Tube mirror F=200mm Product Display.