Hey everybody,

I own a LW Scientiic Observer IV (microscope that is) with brightfield
lighting.  There is a 'tray' for lack of a better word, where you can put
colored lenses to color the light.  On a microscope at school there is a
similar 'tray' that has a few different color lenses and a setting that puts
the scope into darkfield, my question is:  Is darkfield lighting
accomplished with a lens?  If so, where can I get a lens that would fit my
scope?  Thanks in advance!!!!!!

-CR