Condenser for observation of preparations in a dark field for DO Genetic Pro and Evolutio 100 microscopes. It allows to obtain a bright image of the object on a black background, so that the image in the microscope gives only the rays bent by the preparation. Thanks to this, the contrast increases when observing undyed preparations. The technique often used in the study of living objects, including when examining live blood or a drop of water. Oil condenser, NA 1.25-1.36. For use with oil lenses (typically 100x).