TRINOCULAR OBSERVATION HEAD Observation head inclined at 45o.Diopter adjustment ring on both ocular tube.Interpupillary distance from 55mm to 75mm.EYEPIECEWide field Eyepieces 10X (Paired) FOV 20mmOBJECTIVESZoom 0.7X to 4.5X with magnification ratio of 6:1MECHANICAL BODYa) Tilting Stand.b) LED gooseneck.c) 3V LED transmitted lamp with dark field light arrangement. Iris diaphragm.d) Tweezer to hold Gem or Diamond.e) Lateral zoom control movement.MAGNIFICATION RANGE7X - 45XWORKING DISTANCE98mm