An arrangement of three Coscinodiscus asteromphalus. One has moved slightly from its original position. Prepared by Flatters and Garnet, and mounted in Sirax. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo NA 0.65 objective. Olympus Aplanat Achromat condenser, bright field lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. Stack of the central diatom from the arrangement done in Zerene (11 images, Pmax).