Very cool, and I understand the off the shelf parts ambition, but what are those usb microscopes used for? These are absolute garbage (but light weight).

Sounds like they are used for homing. For that they just need to observe a tiny spot at known distance with high resolution

To look at the output they recommend a separate regular microscope

Phisics dictate they have a small depth of field but they can be absolutely incredible.

To see the print? Weird comment.