This 6-filter "Pinkel" quad-band set is designed for sequentially imaging DAPI, FITC, TRITC, and Cy5 (and other key fluorophores – see complete list above). This state-of-the-art set represents a break-through in quad-band performance, and has been tested by independent researchers to have up to four times the brightness, twice the signal-to-noise ratio and substantially lower crosstalk than any other such quad-band filter set on the market. The complete set is comprised of a quad-band beamsplitter and a quad-band emitter (these can be offered assembled in a microscope cube), plus four "no burn-out" single-band exciters that are intended to be mounted in an exciter filter wheel or slider.