[Drosophila] stereomicroscopes: right ring and fluorescence

[Slawek]

Hi,

I am trying to acquire stereomicroscopes.  I have two related questions:


1.  
In catalogues they show an objective attachment called "light ring", which is connected by a light fibre to a light source.  As I understand the light from the ring is focused and send downwards onto the object.  Unfortunately, they don't agree for a demonstration.  Could someone comment how this thing work?

2.
Do you know a cheap source for a stereomicroscope with fluorescence?   It doesn't have to be a very high quality, as it would be used for sorting out GFP embryos/larvae, and afterwards the specimens can be easily checked on a fluorescent microscope.

I would be grateful for any advice,
Slawek Bartoszewski.

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Slawomir Bartoszewski
Rzeszow University
Department of Biochemistry and Cell Biology 
Cegielniana 12
35-959 Rzeszow 
Poland 
Tel.: (017)872-1253
Fax: (017)872-1425
e-mail: slawek from univ.rzeszow.pl
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