TinkerDwagon Quickie: Jiusin DM3 Full HD Digital Microscope: https://www.amazon.com/gp/product/B07D9FK8LW This is what's in the box. Installed in the microscope head is were also a 18650 cell and "SanDisk 16GB" XD card; both of dubious quality at best. Assembly takes ~3 minutes using included hex wrench.
Which yields this base & elevator frame of actually pretty decent quality; everything is metal, except a little friction slider insert and those blue buttons on the objective clamp. Oh, and some little plastic caps on the elevator knobs, which are all metal otherwise; even the camera lens assembly is metal. Quite decent quality given the price point; but the base is just a hair small for even my little project.
Raising the elevator is a little notchy due to the blasted & anodized surface of the rack teeth; it's not too bad and it should get better with use and a little silicone grease.
Quality of the 4.3" screen is actually quite impressive; it is crisp and clear and I certainly believe the claims that it is a 1080P screen. However, magnification simply is not great enough; in order to mostly fill the screen with that 2.1mm chip, the objective is ~20-30mm above the work. There is barely room to get a bent soldering iron tip in there, and no room at all for a hot air nozzle. With objective elevated to 90% of max or so, there is room to reasonably get in there with a nozzle. At that height, the chip measures approx 6.6mm across on the screen; I'll let you do the math as to what the effective diopter is. It simply is not nearly clear enough on either its own screen or the live video app, which displays max 1280x720 res.
Puttering around, I tried getting it to a workable state by cocking the objective in the elevator bracket. This yielded a semi-workable contraption where I could just get in there with a nozzle at ~50mm elevation; this did somewhat risk contacting the plastic objective shell with the hot main body of the rework handset. This layout produced a just-usable image on the screen, but breathing on the unit made the microscope head shift wildly.
Here's a screencap of what it put out at 30-50mm elevation. I toyed with the idea of 3DP-ing something to make a hinged base for the thing, so it would swing back that way properly... but looking again on Amazon, I found a similarly specced 7in model for CAD$113/US$90, or CAD$43/US$35 more.
It has a larger hinged base, and is supposedly 2x the magnification.
https://www.amazon.com/gp/product/B07XVC1LWBFor CAD$112/US$90 , even if the magnification is identical to this one, it will be worth it for the usability factor. It's on its way; should see it tomorrow.
mnem
*toddles off to ded*