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    Re: Calibrating a sextant scale
    From: Alexandre Eremenko
    Date: 2007 Nov 21, 13:29 -0500

    
    Ken,
    
    > I bet you change your mind after
    > trying to take some handheld shots using
    > a 12x scope.  ;-)
    
    I understand what you are talking about.
    (And have some experience with looking at the sky with
    a 10x50mm binocular). And of course I would favor a stable
    platform for this sort of experiments. The problem is that
    I just do not have a good enough 10x or 12x telescope which
    could be attached to my sextant.
    
    Schufeldt says: when people try a sextant with 12x scope they
    feel disappointed first (the stars shake like crazy in
    the field of view). But when they see the results of reduction
    they are surprised how much more precise the results are
    (in comparison with the usual scopes).
    
    > and the ability to take sights for
    > hours without getting tired
    
    That's slightly different problem.
    In measuring star-to-star distances, you can relax as much as you
    need after several shots.
    My hand gets usually slightly tired after 5 shots, and 10
    shots in row seems to be a reasonable maximum.
    But then I just relax for 10 minutes, exercise my hand, etc.
    
    As I said, I do not object a stable platform.
    The problem with my own conditions is that even if I have
    a mount or a tripod, I afraid I will have the same problems
    as with artificial horizon: the whole thing will shake.
    I will probably need a floor of hard rock to install it,
    and this I do not have. Or I will need an extremelly
    heavy mount.
    
    Alex.
    
    
    
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