'Vaiseshika' Biological Microscopes, Series 7007 are in all aluminium pressure diecasting body. These microscopes have the coaxial coarse and fine focusing system with three planetry gears assembly and slide protection lock. Set of four objective lenses with quadruple nosepiece, and sliding /adjustable head makes it a good entry level microscope. A condenser concentrates and focuses light when using high-power objective lenses. Since these lenses tend to have very small apertures, a condenser combined with an iris diaphragm provides increased illumination and resolution. You can easily adjust brightness, contrast, depth of field, and evenness of illumination on your specimen.