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    Re: Simplified Bris Sextant (calibration)
    From: Alexandre Eremenko
    Date: 2012 May 15, 00:34 -0400

    Greg,
    
    > No camera or magnification used. Just the Mark 1 eyeball through
    > polarizing filters.
    
    What's "Mark 1 eyeball"? Naked eye?
    But your Bris, judging from the photos you posted is of clear glass...
    How did you attach a dark filter to it?
    
    You mention "polarizing filters". Can you look through polarizing filters
    at the Sun?
    
    Alex.
    
    
    
    
    
    
    

       
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