Optical condensers are optical components used to concentrate and direct light beams in microscopy or other imaging systems. They consist of a lens system that collects diverging light rays from a source and focuses them into a parallel or converging beam. These condensers are typically utilized to enhance the illumination and resolution of samples by providing uniform and intense lighting. The type 2 condenser is fixed to the bottom of the working stage with 3 screws. It requires 3 mounting hole at the bottom of the stage, and the working stage must be metal. Screws are included.