Read all about it at Compound Eye:
I have engineered a fair number of inexpensive DIY camera hacks. This one is by far the cheapest: it’s free! Simply place a drop of water on the phone’s lens, carefully turn the device over, and the suspended droplet serves as a liquid lens.

A personal blog by Illinois-based biologist and photographer Alex Wild.














There’s a diy laser application going the other direction. Shine your laser pointer through a droplet of water and you cast a large image on the wall with microscopic detail of the droplet contents….Best if you have something living in droplet…
example
http://www.youtube.com/watch?v=oUB3uZwZydU
[...] example, while browsing Alex Wild’s wonderful blog Myrmecos, I found this post. Which links to this post, by the same author. And, boy, what a great discovery this was! I learned [...]