Another large form from the St. Laurent material (thanks Anne). This particular species (to be determined) has large pores which allow better-than-usual resolution of the underlying sieve plate.
Brightfield stack of 50 images taken with a 40/0.95 objective.
Very nice clear crisp detail in this stack, with no trace of mush or halos. Absolutely text book, congratulations. Have you thought of making a Zerene stereo pair from the stacks?