Microscope already has it built in. The PC control of the USB video device is main problem. As a video I have some control but as a still everything is auto controlled by PC.
Also no aperture control.
At x10 and x40 the microscope is far better than D-SLR but at x4 really speaking the two are about even.
The microscope is also very limited to table adjustment can't take images of a watch it's too thick.
These two first with D-SLR with 28mm lens reversed second with light microscope.

Was it really worth all the effort using Photoshop to blend images? If anything one with reversed lens is better!