Very nice. These photos remind me of images I've seen from the Olympus BX series DIC. Nikon and Olympus must use similar prisms. I mean this as a compliment because the images I've seen from the BX scopes are excellent.
It looks like Nikon and Olympus use similar prisms. The condenser's mounting dovetail of both is very similar (you can mount Nikon condenser on Olympus microscope and viceversa).
Olympus has a one prism for all objectives and dedicated condenser modules - it looks to be a bit different system than the one Nikon makes. but the images are great from both of them superb Vorticella images.
I'm looking for the the extemely rare V-IM magnification changer for the E800 scope. If you have seen a listing or have one for sale please let me know.
Those are great images; I especially like the second one, I've never seen that much detail in an LM photo of the surface of a Vorticella before. Great shots.