Cordless Microscope

I don't know how well this fits your "portable" criterion, since it needs a computer and you can't really use it in the field, but I really love these little guys. We have like 5 of them in the lab for doing quick-and-dirty inspections of stuff, and we're actually getting ready to publish a paper that uses data taken with one! I know they're marketed as toys, but I've found them to be really handy (and cheap) tools to have around...


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