Microscope Masterclass -Plan Infinity Optics with field of view 20mm -Parfocal and Centered Optics -Optics with multi-layer Coating & Anti-fungus treated -Choice of halogen and LED illumination -Easy Access for lamp Replacement -Siedentopf head.Hard Coated Stage -Double Slide holder.Inward Nosepiece -Universal Power Supply Specifications *Aluminium die-cast body with all critical movements based on ball bearing & wire guides thereby ensuring smooth & precise manipulation. *Co-axial low drive mechanical stage(125mm x 145mm)(+/-5mm)with traverse area of 50mm x 76mm(+/-5mm)with dual side holder. *Co-axial coarse & fine controls with a focus adjustment and fine adjustment knobs.Coarse focus range 20mm.Fine focus range 0.2mm *Rack & pinion mounted condenser holder *Centerable abbe condenser with aperture iris diaphragm(N.A.1.25)focusable with rack & pinion through 20mm and a continuously variable iris diaphragm with a removable blue filter for day light observation. *(a)Built-illumination base with pre-centered 6V 20W halogen light source coupled with an efficient collector lens systems.Front open light case for easy bulb change.Universal power supply 100V-240V through SMPS circuit for constant voltage to prolong bulb life & prevent frequent bulb change. *(b)LED Light source High brightness,longlife(30,000hrs) (c)LED Light source(with battery back-up)high brightness,longlife(30,000hrs).Battery back-up in built NiMH Rechargeable batteries provide 6 to 8 hrs back-up on full charge. *Quadruple revolving inward nosepiece based on precision ball bearing mechanism with positive click stop.Quintuple nosepiece option is also available. *Binocular(30 degree inclined seidentopf),360 degree rotatable,diopter adjustment *Trinocular head 30 degree inclined seidentopf *WF 10x(FN 20mm) paired eyepiece.The unique optical design of the compensating eyepiece provides relief from eye fatigue and renders colour-compensated wide-field images of utmost clarity.Compatible with optionally available eyepiece micrometer.