In these cameras, the zoom is digital (controlled by the software) and the focal point is optical (controlled on the camera).
With mine, I worked as close as a few millimeters from the PCB to as far as more than an inch.
I could get magnification from 40x to over 250x, depending on the setting of the focal point.
In addition, using a large monitor helps to see small details better than a phone or tablet.
I learned that zooming and focus varies with each camera type and price range, so I suggest downloading the User's Guide before buying.
73 de W4OED