Professional USB Microscope
Instead of an eyepiece there is a 'video eyepiece' that connect to a computer.
The software enables you to capture an image (take a photo), and you can also capture video.
The software is included but the computer is not.
Adjustable height + focus knob, zoom know gives continuous focus from 1X to 4X - normally that would mean "1X to 4X the magnification of hte objective lens". However, this arithmetic doesn't really work for a video camera because the image size depends on the monitor. Also, there is an extension tube that you can fit between the video sensor and the eyepiece tube which, I estimate, takes the magnification way beyond 40X. The resolution is 1280X1024 pixels.
The following images were captured directly from the microscope (i.e. they are not photographs of the computer monitor); the lady is Elizabeth, I found her on a postage stamp:
How to choose a magnifier (plus everything you would ever want to know about magnifying lenses)
How to choose a jewellers' loupe (including examples of what you will see through loupes)
How choose a binocular headband magnifier (from simple hobby model to a professional surgeons' / dentists' models)
How to choose a magnifier for the partially sighted (specialist low vision aids including lenses and video magnifiers)
How to choose a video magnifier (from small pocket-size electronic readers to a large table model)
How to choose a UV loupe (ultra violet light)
Calculator (Excel format) - enter the magnification, it tells you the working distance, or enter the working distance, it tells you the magnification.
How to choose a stereo binocular microscope (all sizes and magnifications)