I built an effector for the DexArm to pick up one of these cheap (10-20€ on AliExpress/Amazon/Ebay) but great Chinese USB microscopes. Due to the fine control and steadiness of the DexArm it’s like a charm to examine things with the microscope. Everyone owning such a microscope might know how hard it is to focus it on the right spot by hand or with the really wonky stand that comes with the microscope.
See it in action:
If you want to print your own feel free to download it from https://www.thingiverse.com/thing:4570103