This is a specialized adjustable zoom lens for industrial, scientific, or hobbyist microscope cameras.

It has a C-mount thread (a standard size for many machine vision and microscope cameras), so you can attach it to a compatible camera in place of a regular lens.

The cool thing is its zoom range: it can magnify from about 0.7X up to 4.5X through the lens itself.

When you combine that with the magnification from your camera's sensor and display, you can achieve an effective magnification of around 10X to 180X on your monitor screen.

It has a long working distance of about 95mm, meaning you can have the lens almost 4 inches away from the object you're inspecting, which is useful for soldering, PCB inspection, or looking at small parts.

The package includes the main lens and a 0.5X adapter.

It's a manual focus lens, so you adjust the ring to get a sharp image.

This isn't a toy; it's a tool for detailed inspection work, electronics repair, or educational projects where you need to see tiny details up close on a screen.