Pictured is a Nikon Plan Fluor 40X microscope objective for Nikon the Eclipse E200, E400, E600, E800, E1000, 50i, 55i. 90i, Ci, and Ni series scopes. The optical condition is perfect with no trace of dust, element separations, fungus or scratches.
As you can see there is a little nick in the metal case. Nikon CFI Plan Fluor Series lenses are for research, clinical, educational applications. It features an exceptionally high transmission from the ultra-violet to the infra-red light spectrum, with flatness across the entire field of view. It is ideal for critical fluorescence applications providing incredible high contrast observation and excellent color correction for photomicrography. The performance and quality of Plan Fluor objectives make them a terrific choice as multipurpose objectives for brightfield, darkfield, fluorescence, polarization and DIC observations.