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    Re: Scope mounting on vernier sextant?
    From: Brad Morris
    Date: 2013 Dec 10, 11:25 -0500

    I also do not see a rising telescope.  It appears to be fixed height. The base of the scope mount is bolted through the sextant frame. 

    I also do not see an adjustment for collimation, or the tilt of the scope towards / away from the plane of the frame of the sextant.

    Brad

    On Dec 10, 2013 9:41 AM, "Alexandre Eremenko" <eremenko@math.purdue.edu> wrote:

    It does not look like a reproduction,
    but it really does not have the rising piece.
    When you see it you can check.
    
    Alex.
    
    > I'm supposed to go Thursday to look at my "final" extant purchase - an
    > old, full size, vernier sextant. So far almost everything in the photos
    > checks out but I'm wondering about the scope mounting system.  I don't see
    > a rising piece or a method of adjusting the sight path of the scope -
    > attached photos. I would have expected those two features on one of these
    > works of art.
    >
    > The adjustable split mounting ring for the scope might be obscured by
    > corrosion but I don't see any sort of rising piece. Were some of these old
    > sextants made without these features, has there been a modification to
    > this one, am I being offered the world's best reproduction, or am I
    > missing something obvious in the photos and about to publicly embarrass
    > myself?
    > Regards, Noell
    > ----------------------------------------------------------------
    > NavList message boards and member settings: www.fer3.com/NavList
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    >
    > Attached File: http://fer3.com/arc/imgx/Vernier-rising-piece.pdf
    > Attached File: http://fer3.com/arc/imgx/Vernier-scope-ring.pdf
    >
    >
    > : http://fer3.com/arc/m2.aspx?i=125705
    >
    >
    >
    >
    
    

    : http://fer3.com/arc/m2.aspx?i=125706

       
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