PCB microscope digital zoom vs optical zoom
&quot;Digital zoom&quot; is just marketing speak, and doesn't offer anything very useful.  Once the camera, microscope or whatever runs out of optical zoom, then digital zoom consists of taking a small patch of pixels out of the centre of the sensor, and expanding those up to fill the whole screen.
As you increase the digital zoom you end up with either a blocky or blurred image, that doesn't show you any more detail than the original image did.