Skimming the forum, I found this post by @r.w.bowman: https://openflexure.discourse.group/t/looking-at-bigger-non-transparent-objects/
I share two links from it that may be the starting point for any dissection microscope:
- OpenFlexure Dissection Microscope (2018): https://rwb27.github.io/openflexure_dissection_microscope/docubricks/
- FlyPi (2017): FlyPi – Open-Labware.net