OPTO-EDU A11.1009-E1 compound biological microscope with eight level magnifications from 40X to 2000X. It comes with a sliding binocular viewing head, two pairs of wide field eyepieces (WF10X, WF20X), four achromatic objectives DIN 4X, 10X, 40X(S), 100X(S, Oil), large double layer mechanical stage with scale, Abbe NA1.25 condenser with iris diaphragm, coaxial coarse & fine focus knobs and variable intensity LED transmitted illumination system, plus 100-piece blank glass slides & 100-piece cover slips and 50-sheet lens cleaning paper. It easy to connect USB digital camera (sold separately) to record what you see in the microscope and saving it into your computer as a picture or a video clip. The compound microscopy is suitable for teaching demonstration, medical labs, educational lab environments, veterinary clinics. Eyepieces: wide field WF10X and WF20X; Objectives: achromatic DIN 4X, 10X, 40X(S), 100X(S, Oil); Viewing head: 45 degrees inclined 360 degrees swiveling binocular; Sliding adjustable interpapillary distance: 2-3/16inch ~ 2-15/16inch(55~75mm); Ocular diopter adjustable on both eye tubes.