Advanced Ergonomic Design – In-line focus and stage controls are ergonomically positioned to allow a natural sitting posture for comfort and convenience even over long periods of use. Ergonomic binocular tube allows adjustment of the eyepiece tube tilt angle and the eyepiece length to suit a range of individual operators. Comfortable, compact, solid and stable body design - allows for less operator fatigue during long periods of observation. Excellent Optical Performance -- Brilliant, sharp images in all magnifications along with high resolution and contrast, chromatic aberration free correction (CF), and top transmission rates. They also allow the use of multiple observation techniques such as brightfield, darkfield, epi-fluorescence, phase contrast. Low profile stage. 5 Position, reversed nosepiece. Total flexibility and versatility to accommodate various attachments such as epi-fluorescence, dual head and multiple head teaching systems without compromising optical performance and stability.