I really like the old Intel Play microscopes, you can find them on eBay for $20. They really weren’t meant to work on Macs, but you can grab this tool (miXscope) and you’re pretty much good to go. While the microscope isn’t professional grade, it does have 3 zoom levels and a light, so I usually use it for some electronics and weird experiments – here are some picture of it in action, images it can take and features…
Photo taken at 10x.
Photo taken at 200x.
Photo taken at 60x.
Time lapse movie mode. I want to do a time lapse with some type of food that spoils.
More on the scope here – Link.