Section of Barbados rock showing polycistina in-situ. Prepared by Edmund Wheeler. Olympus BHB microscope using 450nm light. 10x Nikon Plan Apo NA 0.45 objective. Olympus Aplanat Achromat condenser, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. Single unstacked image.