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Barbara Foster wrote:

> The working distance is defined simply as the distance between the front 
> element of the objective (OR condenser, since it has a WD also) to the 
> top of the specimen.  For the objective, the coverslip is considered the 
> top of the objectivev..

Barbara--

Did you mean to say "For the objective, the coverslip is considered the
top of the objective," or "For the objective, the coverslip is 
considered the top of the SPECIMEN."

Martin
-- 
Martin Wessendorf, Ph.D.                   office: (612) 626-0145
Assoc Prof, Dept Neuroscience                 lab: (612) 624-2991
University of Minnesota             Preferred FAX: (612) 624-8118
6-145 Jackson Hall, 321 Church St. SE    Dept Fax: (612) 626-5009
Minneapolis, MN  55455             E-mail: martinw[at]med.umn.edu