Cuxhaven strew slide, Watson and Sons

Cuxhaven strew, 40x Leitz Pl Apo NA 1.00 objective
Cuxhaven strew, 10x Nikon Plan Apo NA 0.45 objective

A strew slide of recent marine diatoms from Cuxhaven, Germany. Prepared by Watson and Sons. 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. 23 images stacked in Zerene (Pmax). Seems to be some issues with the mount across the slide – bubbles in the middle of quite a few of the diatoms which can be seen in the 10x image of the strew.