Also, while people have generated various test samples of collagen and latex and acrylic and fat globules and glass beads and carrageen gum and dissolved Scotch tape glue etc., the only test sample that really answers the question is the sample itself.  
________________________________________________________
Michael Cammer, Assistant Research Scientist
Skirball Institute of Biomolecular Medicine
Lab: (212) 263-3208  Cell: (914) 309-3270


-----Original Message-----
From: Confocal Microscopy List [mailto:[log in to unmask]] On Behalf Of Steffen Dietzel
Sent: Thursday, October 04, 2012 10:30 AM
To: [log in to unmask]
Subject: Re: Oil vs water objectives

So we are back at Michael's comment: You've got to test it. Beads attached to the coverslip and the slide (various preparations with various distances between the two) give good test objects.

Steffen