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Hal, have you seen these? Some guys on the knife forums have had great things to say about them. Built in light source and 200x mag:

http://www.compuvisor.com/qx5diblmicom.html

I use a 10x jewler's loupe to check the scratch pattern and edge damage on my knives. The bevel is obviously smaller on the razor, but I can still see quite a bit with it. Microscopes are very...