Agilent Technologies announced the availability of the Polychrome 3000, an ultrafast filter-switching light source for fluorescence microscopy applications. The light source uses high-precision galvanometer-driven mirrors to direct white light to different filter positions. The setup allows changing between filters in milliseconds. A filter slider on the front of the system allows users to exchange up to five filters in a single pass. All filter positions offer equivalent brightness and homogenous illumination of the specimen. The filters used are standard 25 mm diameter filters that can be up to 5 mm thick. This instrument uses an optimized light path combined with advanced condenser technology and a stable quartz fiber light guide. This leads to the highest brightness in the specimen plane.