Really small critters

I finally spent the time to replace the rather expensive incandescence bulbs in my Nikon Model M with high intensity LED lamps (using a small desk lamp from Ikia).  The result were better than I expected!  Here is a dark field image of some rotifers that were in a dish filled with rain water in my flower garden.

They are not sharp since they are moving rather rapidly, but all in all they don't look bad!