An arrangement of Coscinodiscus radiatus from Hong Kong. Prepared by Edmund Wheeler. There looks to be a scratch or crack in the coverslip (visible in the 10x objective image) although this is not visible to the naked eye. The main image shows the lower right diatom. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 31 images stacked in Zerene (Pmax).