products I own

The AmScope H2510, which does 20X, 50X, and 100X:

• eye tube diameter — 23 mm
• set-screw on the eyepiece — this requires a 0.9 mm hex wrench

Accessories for this microscope:

• AmScope MD500 — a 5 MP eyepiece camera with a USB connection
• Skilhunt H200 Mini, high CRI — a more compact light source

Illuminated loupe, 10X, no-name brand.