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    Re: ReRe: Level of observation accuracy
    From: Frank Reed CT
    Date: 2004 Jul 24, 15:29 EDT
    Bill wrote:
    "While I hate to admit it, started this quest a couple of months ago with
    Celestaire's Wurzburg cardboard sextant.  Manufacturer claims it can be
    accurate to within 8 minutes of an arc.  With a little mirror tweaking and
    putting a horizontal slit across the eye side of the viewing tube, am
    getting within 2-3 minutes consistently from seated position on a stable
    platform or tripod mounted.  So I figure plus/minus 3 minutes is my range of
    instrument slop.  Humidity does affect index error. <G>"

    Very interesting. Cheap sextants are nothing to sneeze at. Most people eventually prefer to get a fancy one simply because they look so professional, but by practical standards plastic and cardboard sextants are very good.

    Frank R
    [ ] Mystic, Connecticut
    [X] Chicago, Illinois
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