Here is an interesting find which I have not managed to identify. It might be a fungus spore, a Chlamydospore, but please correct me if I am wrong.
All images are captures using a uplanapo 40X/0.85 objective.
Specification of the filter cube used:
Excitation: 375-450 nm
Dichroic: 480 nm Long Pass
Emission: 490 nm Long Pass
EPI-illumination with a mercury lamp.
Here is a comparison image (in DIC) to show how it looks in visible light.


This is brightfield (low light) in combination with fluorescent light:



Here is, what I believe, an Amoeba test:
