... operation 5)Durable using Mircoscope Type: Converging stereoscopic microscope Magnification : 2 steps Eye piece 10×Total Magnification and Diameter of Visual Field ... 0 ~ 180°adjustbaleLight Spot Diameter(mm) φ14,φ10,φ5,φ3,φ2,φ1,φ0.2Filter : heat absorption,grey,red free, cobalt blueIllumination ...