Rigid and stable body with monocular observation tube inclined at 45° quadruple revolving nospiece, special detachable mechanical stage. Incident light through epi-illuminator with iris diaphragm and slot for filters, solid state variable light control transformer for 6v/20 watt halogen bulb, with following optical combination : Objecitves : M5x, M10x, M20x, M40x (SL) Eyepieces : 10x (WF), 15x (H)