Place it on a. This means the light rays entering the eye are effectively parallel. Light Microscopes An Overview Sciencedirect Topics Electron microscopes use an electron beam in place of photons to produce much higher resolution images about 016 nm. . The magnification of the eyepiece is Me x2y2. Objective lenses specimen illuminator condenser lenses body tube ocular lens eye. The term Köhler-illuminated microscope describes a system in which all the optical components are design-optimized to work together and are mutually focused upon one another. In this configuration certain image planes will always coincide. The difference between a stereomicroscope and a compound microscope is that in the compound microscope there is a single path of light that travels in a way such that it splits before reaching the eyepiece. The Light Source and Associated Lenses. Trace the path of light from the light source thro...