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Thanks very much for the explanation, I think I will have to get a newer and better scope.

I am using it at daylight when I can, at night I take it under a lamp that gives a fair amount of light, but maybe it is not enough.

I am using something like this, just a cheaper and older version.

http://i00.i.aliimg.com/photo/v0/257209942/Kid_Microscope.jpg

I am using a very cheap stereomicroscope to check the edge of the razor while honing. My problem is that after a few hours of honing my vision becomes blurry, I have a bit of a headache, and this...