Bresser Bioscience 40-1000x Trino Microscope: The BioScience is an optimal instrument for study and science. Characteristics: Köhler Iluminator, separate AC-adapter for high end safety, coaxial mechanical desk with nonius scale, coarse and precise focusing. Technical Specifications and Features: Type: Transmission microscope, Head: Trinocular, Standard Eyepiece: WF 10x (23 mm diameter), Standard Objectives: DIN 4x / 10x / 40x / 100x oil retractable, Magnifaction: 40x - 1000x, Type of objective: Achromatic, Illumination: 12V / 30W halogen, with dimmer, Standard Condenser: Abbe N.A. 1.25, Power Supply: 110V-230V AC power. Net weight total (incl. accessories) = 17.4 lbs.