Specifications: Total Magnification:   100x-750x (1500x with optional eyepiece & objectives. Objective :  Achromatic Strain free 10x & 45x/50x. Eyepiece : : Huyghenian 10x (Cross Hair) and 15x. Nosepiece :  Triple revolving ball bearing self centered nosepiece Analyser & Bertrand lens provided in separate slide. Circular Centering Stage with degree calibration, with two aplanatic Abbe condenser with rotatable polarizer mount having 15 deg calibration. Equipped with an incident ray illuminator provided with Iris Diaphragm and built in incident ray polarizer & a low voltage bulb. Coarse focussing adjustment. Optional Parts & Attachments: Compensators : Mica Quarter Wave and Gypsum Red 1st Order Plates. Strain free objectives 4x/5x, 100x oil immersion spring loaded. Quartz wedge Ist to IVth Order