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    Re: Sextants with Polarizing filters
    From: Fred Hebard
    Date: 2006 Feb 7, 09:48 -0500

    On Feb 7, 2006, at 9:41 AM, Fred Hebard wrote:
    
    > I expect that problems with salt, condensation and freezing of
    > rotation such as you describe may well have been much more important
    > in "market rejection" of crossed polarizing filters for shades than
    > problems with shade errors.
    
    
    I can also imagine that a "frozen" set of polarizing filters could
    lead to one bending the shade, leading to the shade error.
    
    
    

       
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