An arrangement of two Pseudostictodiscus angulatus. No mounters name but this was prepared by J Tempère. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 41 images stacked in Zerene (Pmax).
I got a bit lucky with this one. The coverslip is quite small on this slide, which can sometimes hinder my use of the 63x Leitz objective as it is relatively large and flat at the tip. I just had enough room to get all parts of the diatoms in focus before the objective came into contact with the slide.