How Model BESTO-6 Microscope works in its unique way . Pressure Die Cast interchangeable Components . Wide Field Eyepiece WF 't0x & Huygenian eyepiece 1 5x . Bright Field Condenser having N.A. 0.65 . Two achromatic parfocal objectives 10xand45x(SL) . Square Plain Stage 110x11Omm with newly developed spring stage clips. . Special Rubber feet at microscope base for positive grip. . Easy focus by coarse motion & very fine slow motion knobs. . Magnification: 100x to 675x . Plano Concave Mirror illuminator.