45mm DIN Achromatic Objective:4X,10X,40X(S),100X(S, Oil) Wide Field Plane-Scope Eyepiece:WF10X,WF16X; Total Magnification:40X-1600X Sliding Trinocular Head,Interpupillary Distance:55-75mm;45?Inclined,360?Rotatable Double Layers Mechanical Stage:140X155mm, Moving Range X-Y:70X50mm ?-?0mm Iris Diaphragm And ?2 Filter; ABBE Condenser:N.A. 1.25 Coaxial Coarse And Fine Focusing Adjustable Mechanism:25mm,Precision:0.002mm Built-in Adjustable Brightness Halogen Lamp 6V/20W Net Weight/Set:6.4kg; Package:1 Set/Carton 38X34X50cm; Gross Weight/Carton:11.5kg