45mm DIN Achromatic Objective:4X,10X,40X(S),100X(S, Oil) Wide Field Plane-Scope Eyepiece:WF10X/18,WF16X/13; Total Magnification:40X-1600X; Articulated Free Binocular or Trinocular Head,Interpupillary Distance:55-75mm;30º Inclined,360º Rotatable The Adjustable Height range of the Vertical Tube:10mm ; Double Layers Mechanical Stage:140X155mm, Moving Range X-Y:70X50mm Ø2-Ø30mm Iris Diaphragm And Ø32 Filter; ABBE Condenser:N.A. 1.25 Coaxial Coarse And Fine Focusing Adjustable Mechanism:30mm,Precision:0.002mm Built-in Adjustable Brightness Halogen Lamp 6V/20W and Kohlar Illumination System B(Blue)Exciting Lighting Filter System,Wavelength 450-490(nm); G(Green)Exciting Lighting Filter System,Wavelength 510-570(nm); V(Violet); U(Ultraviolet Radiation);