Magnification range: 40X-1600X Viewing Head: Seidentopf Binocular Head; 45癷nclined; built-in prism type;Diopter adjustment;Interpupilary distance adjustment: 52-75 mm Eyepiece lens: WF 10x, high-eye point, reticles and pointer available; WF 16x Nosepiece: Quadruple click-stop, revolving mechanism with multiple ball bearings; Coarse and fine focusing: Extra-large graduated coaxial coarse and fine focus controls; Coarse motion torque adjustable; Mechanical stage: Stage size 142 (W) x 132 (D) mm;Double-plate system stage with removable slide holder; Travel area 75 (X) x 55 (Y) mm with a right-hand stage handle; Condenser : Abbe NA=1.25 condenser with variable diaphragm and light filter Objective lenses(Anti-mold): Achromat 4X, N.A. 0.10, W.D 25mm Achromat 10X, N.A. 0.25, W.D 5.6mm Achromat 40X, N.A. 0.65, W.D 0.6mm, spring loaded Achromat 100X oil, N.A.1.25, W.D 0.14mm, spring loaded Illumination: Halogen 6V-20W, 60Hz or 50Hz, 100V-240V universal power supply Adjustable brightness Electrical parts UL/CSA approved Standard accessory: 6V-30W spare halogen lmp ---1pcs Fuse(250V, 1.5A) ---1pcs Blue ground glass filter---1pc immersion---1 bottle Dust cover --- 1pc Optional accessories: Plan-Achromatic objectives: 4x; 10x; 40(s); 100(s,oil)