TRINOCULAR OBSERVATION HEAD Siedentopf observation head inclined at 30° rotatable at 360°.Diopter adjustment ring on ocular tube.Interpupillary distance from 55mm to 75mm.WORKING RANGE 110mm.EYEPIECEWild field Eyepieces 10X (Paired) FOV 20mm.OBJECTIVESAchromatic 2X and 4X revolving on turrent mount with quick changing mechanism.MECHANICAL BODYa) Rack and pinion focusing with a slip clutch mechanism. b) Incident and transmitted light system with 12V-10W halogen tungsten lamp.The system regulated with transformer has intensity control knob.On/off switch to provide flexibility to use either both light or any of them.c) Clip for holding specimen.MAGNIFICATION RANGEWith 10X Eyepiece 20X to 40X.