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    Re: Sextants and Glue [was Sisteco Prismatic Compass]
    From: Joel Jacobs
    Date: 2004 Mar 20, 11:53 -0500

    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
    Joel Jacobs
    ----- Original Message -----
    From: "Fred Hebard" 
    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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