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Dear Fred,

Other people wrote a lot of nice things about Ludl, Prior, ASi stages. 
I'd add to the list the stage of Märzhauser. We have several of them, 
some with linear encoders, some without. Most of them we control with 
the Corvus controller, but one we control with a Ludl controller. So far 
we are completely satisfied with them. The reason the choose them over 
others was that (at least in Switzerland) they were cheaper (min 10%) 
then anything else.

Cheers    Gabor

P.S. Obviously I have no commercial interest..

-- 
Gabor Csucs 
Light Microscopy Centre, ETH Zurich
Schafmattstrasse 18, HPM D8.1 
CH-8093, Zurich, Switzerland

Web: www.lmc.ethz.ch
Phone: +41 44 633 6221
Fax: +41 44 632 1298
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