Dissecting/stereo microscopes.

Tim Eck teck11@embarqmail.com
Sat, 08 Feb 2014 18:16:36 PST
One correspondent wrote privately to suggest I investigate acquiring (or
making) a webcam microscope.  From what I'm finding on the web, this is a
fairly effective and extremely inexpensive way to get a good look at small

A webcam sounds like a great starting point.  It has a miniscule numerical
aperture but you only need 0.02 - 0.05 for what you're doing.  Carl Zeiss
still makes the best stereo-zooms and Bausch and Lomb, Cambridge
Instruments, Reichert, Wild, and all those others are extinct or bought up
by Leitz.  In my experience, the old stereo-zooms are truly dinosaurs.
Twenty years ago used ones were worth their weight in gold because everybody
could use them, not just the microscopists.  If you can find one for free,
get it but be careful of spending money for one since you won't know what
parts are missing until later.  
Things have changed.  We used to pay $500+ for a halogen fiber-optic
illuminator and now you can get a cool LED light for pennies.  The old
Bausch and Lomb Research II had a light path that traversed sixty lens
surfaces and you wondered why the image had haze.  

More information about the pbs mailing list