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    Re: Don't do this to a sextant
    From: Alexandre Eremenko
    Date: 2006 Nov 8, 00:57 -0500

    
    Here is an illustration to what I was saying:
    an old sextant that looks nice,
    but the index mirror is transparent: all silvering is gone.
    See the third picture in the second column.
    E-bay item 170047453767.
    
    Alex
    
    On Tue, 7 Nov 2006 FrankReedCT@aol.com wrote:
    
    > I agree. There are still some companies that do mirror "aluminizing" or
    > "resilvering" for telescope optics. They should be able to do sextant  mirrors
    > which are comparable in size to the secondary mirrors in Newtonian  reflectors.
    > You might try googling "telescope mirror resilvering" etc. Of  course, this is
    > expensive. It may be cheaper to acquire sextant mirror  spares and then cut
    > them to fit an older sextant.
    >
    > The prices of high-quality commercial telescopes have declined dramatically
    > in the past twenty-five years so home-built telescopes,  and the cottage
    > industries that supported them like mirror  resilvering, are becoming rarer. But,
    > wow, you sure can get a great  telescope for a modest amount of money! Damn
    > shame the stars have  disappeared...
    >
    > -FER
    > 42.0N  87.7W, or 41.4N  72.1W.
    > www.HistoricalAtlas.com/lunars
    >
    >
    > >
    
    
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