An arrangement of four Mastogonia sp. from Moreno shale, Panoche Hills, California. Mounted in Hyrax. Prepared by JA Long. Olympus BHB microscope using 450nm LED light. 20x Nikon Plan Apo NA 0.65 objective for the image of all of them. Olympus Aplanat Achromat condenser, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 33 images stacked in Zerene (Pmax).
On the slide, the fourth example (on the right) was further away from the other three. I brought them closer together in Photoshop, to make the final image less of a letterbox.
I also imaged the single one at higher resolution. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, slightly oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 111 images stacked in Zerene (Pmax).