This is a post in reply to a short conversation I had with Steve Schwartzman on his blog a few days ago.
Quite a few folks use a scanner as a camera, there are even scanner backs for cameras. Rather than pressing this leaf in my large dictionary, I decided to press it under the scanner cover and see what it looked like. Not too bad for a non-dedicated tool. This was back in 2007 and I bet the newer scanners could get even more detail right into the stomata.