Optical System : Finite Optical System Viewing Head : Seidentopf Trinocular Head, Inclined at 30°, 360° Rotatable, with locking mechanism for eyepieces, ±5 diopter adjustment on left tube, Interpupillary Distance 50-75mm, Light Distribution Eyepiece: Trinocular=80:20 Eyepiece : Wide field plan eyepiece PL10×/18mm Objective : Achromatic Objective 4×/0.10, WD=21.50mm, 10×/0.25, WD=6.26mm, 40×(S)/0.65, WD=0.48mm, 100×(S,Oil)/1.25, WD=0.15mm Nosepiece : Backward Quadruple Nosepiece Stage : 132mm×140mm double layers mechanical stage, moving range: 50mm×6mm, precision: 0.1mm. Focusing : Low-position coarse and fine adjustment with stop and tighten structure, moving range: 25mm, fine precision 0.002mm Condenser : NA 1.25 Abbe condenser with iris diaphragm and filter holder Illumination : 3W LED (cold color temperature or warm color temperature is optional, cold color temperature 4750K-5500K, warm color temperature 2850K-3250K), center presetting, intensity adjustable, external wide voltage AC adapter, 100V-240V_AC50/60Hz input, DC6V 2A output. Packaging : 1pc/carton, 51cm30cm58cm, GW:10kgs, NW: 8kgs