I have just updated the section about microscope lenses
Some people regard the Mitutoyo M plan Apo’s to be the gold standard for photographing trough a microscope objective from 5x and up. Having problems with the chromatic aberration with some subjects when I used other non-apo microscope objectives and after seeing some great photos with the 10x lens I bought a 5x, 10x and 20x from a known seller on Ebay. I have been using these lenses on a regular basis since 2014. The 5x is easiest to use and, the 10x resolves more but needs much more steps focus stacking. Of the tree lenses I mostly uses the 5x and the 10x. Click on the pictures and read more about them.