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    Re: Sextants and Glue [was Sisteco Prismatic Compass]
    From: Fred Hebard
    Date: 2004 Mar 20, 12:17 -0500

    Thanks Joel
    
    On Mar 20, 2004, at 11:53 AM, Joel Jacobs wrote:
    
    > Hi Fred,
    >
    > I suggest you get some Cyanoacrylate clue. It come is various
    > viscosities.
    > The one I like is blue labeled Super Thin with a cure rate of 1-3 sec.
    >
    > Experiment with this on some test items until you feel comfortable
    > with its
    > running action.
    >
    > A companion product is Un -Cure, a debonder.
    >
    > The glue is space age technology, and will work with anything.
    >
    > Best Source: Your local hobby shop.
    >
    > I also have some spare parts that might work though they are Japanese,
    > not
    > C-P.
    >
    > Joel Jacobs
    >
    > ----- Original Message -----
    > From: "Fred Hebard" 
    > To: 
    > Sent: Saturday, March 20, 2004 8:56 AM
    > Subject: Re: Sextants and Glue [was Sisteco Prismatic Compass]
    >
    >
    >> Jared,
    >>
    >> I believe my sextant is the C&P Professional Sextant, as referred to
    >> on
    >> their website.  However, I am not familiar with older designs.
    >>
    >> It has 3 horizon and 4 index filters plus an astigmatizer added to the
    >> the index filter rack.  There is no added button on the micrometer
    >> dial
    >> for adjusting for dip and index error.  The mirror housings are
    >> aluminum, as best as I can tell.
    >>
    >> Most lens systems I have disassembled glued the compound lenses
    >> together, but mounted them with threaded rings in the barrel.
    >> Retaining clips also could be used for filters.
    >>
    >> If it's so easy to replace, do you know how I might dissolve the old
    >> glue clinging to the two horizon filters that have fallen out and what
    >> sort of glue I should use to replace them?
    >>
    >> Fred
    >>
    >>
    >>
    >> On Mar 19, 2004, at 8:02 PM, Jared Sherman wrote:
    >>
    >>> Fred, I would bear in mind that most of the finest camera lenses in
    >>> the
    >>> world today are in fact built up from multiple elements--glued
    >>> together.
    >>> Glue is literally the stuff that makes precision optics possible
    >>> today.
    >>>
    >>> If the alignment and material selection is done properly, the glue
    >>> joint is
    >>> stronger, lighter, and thinner than screwed metal rings. It will
    >>> never
    >>> seize
    >>> up, and it is easily replaced when and if need be.
    >>>
    >>> There are also combat aircraft whose wings are literally glued on.
    >>> Glue is
    >>> not necessarily a bad thing! And if it happens to keep down the cost
    >>> of the
    >>> sextant, even better.
    >>>
    >>> Which sextant did you get? How big is the filter rack on it? (How
    >>> many
    >>> filters?)
    >>>
    >
    
    
    

       
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