BM620 Series Biological Microscope With nice shape, excellent optical system and reliable structure, it makes image sharper, operation easier. Wide range of accessories such as dark field, phase contrast, epi-fluorescent , it is available for your particular observing requirements. 　 Big Operating Space with Backward Nosepiece, Sharp Image with High Quality Objectives Easier Comparing Test with Dual Slides Finger of Mechanical Stage Comfortable Handling with Precise Focusing System 　 　 Specification 　 Parts Specification Viewing Head Compensation Free Binocular Head, Inclined at 30°, 360° Rotatable. Eyepiece Wide Field Eyepiece WF10X, P16X Objective CF High-contrast Objective 4X, 10X, 40X, 100X Nosepiece Backward Quadruple Nosepiece  Stage Double Layers Mechanical Stage 140X140mm/75X50mm Condenser NA1.25 Abbe Condenser with Lris Diaphragm and Filter, Rack & Pinion Adjustment Illumination Halogen Lamp 6V/20W,Brightness Adjustable Option Parts Specification Viewing Head Monocular Head, Inclined at 30° , 360°  Rotatable. Compensation Free Trinocular Head, Inclined at 30° , 360°  Rotatable Eyepiece Wide Field Eyepiece WF10X W/Pointer Wide Field Eyepiece WF10X W/0.1Micrometer High Point Eyepiece WF10X/18.5 Extra Wide Field Eyepiece EW10X/20 Wide Field Eyepiece WF20X Objective Achromatic Objective 4X, 10X, 20X, 40X, 60X, 100X Plan Achromatic Objective4X, 10X, 20X, 40X, 60X, 100X Infinite Achromatic Objective System 4X, 10X, 40X, 100X  Infinite Plan Achromatic Objective System4X, 10X, 20X, 40X, 100X Nosepiece Quintuple Nosepiece Stage Double Layers Mechanical Stage 160X140mm/75X50mm Condenser Dark Field Condenser(Dry)NA0.9 Dark Field Condenser(Oil)NA1.25-1.36 Collector Kohler Illumination Aspheric Collector Others Simple Polarization Set Simple Phase Contrast Kit Sliding Phase Contrast Kit Turret Phase Contrast Kit Epi-fluorescent Attachment Photography Attachment 1X & 0.5X Video Attachment Drawing Attachment