 The introduction of the Eclipse range of infinity optics in the 1990s was a departure from traditional microscope design.CFI60 optics have high numerical apertures (N.A.s) and long working distances, increased resolution and light-gathering capability and high performance in confocal imaging.The infinity optical system also has the benefit that the distance between the objective and the eyepiece tube is not fixed, allowing a variety of imaging modules to be inserted into the light path without any compromise in optical quality.