Carl Zeiss Jena Vertical Illuminator - boxed, with (almost) all accessories + extra objectives for Carl Zeiss Microscopes A Vertical Illuminator-Condenser for a Carl Zeiss Jena microscope is a polarizing accessory that directs light from an external horizontal source down through the objective for transmitted illumination on transmitted light microscopy. It features components like a collector lens, a slot for a field diaphragm and polarizer, an analyzer filter, and compensator slots for polarized light microscopy. This device is essential for viewing the sample under polarized light conditions, often used to study the optical properties of anisotropic materials. It is very rare to find such a complete set, and additionally, four extra objectives are added, attached to the objective holders. Photos attached to the listing are part of this description!