BS-Series of Biology Microscope BS-313 BS-212 BS-012 Microscope frame Focus Fine:0.2mmper rotation Minimum reading:2 micron on side knob Coarse motion torque adjustable; Refocusing stopper incorporated Illuminator Built-in illumination, Halogen lamp110V or 220V/6V20W Revolving nosepiece Five times Quadruple Quadruple Observation tube, inclined30°. Trinocular tube Binocular tube Monocular tube Stage Double layers mechanical stage140X140mm/75X45mm Condenser Abbe NA1.25W/lris, rack&pinion adjustment Plan achromatic objectives 4X, 10X, *20X, 40X(spring), 100X(spring, oil) Wide field eyepiece WF10X , *WF16X *reflected light fluoresce o o o *dark field o o o *Phase contrast o o o *Digital camera o *Video camera o Remarks: Objects mark with * will be added depend on your necessity.