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    Re: theodolites
    From: Gary LaPook
    Date: 2008 Jan 8, 14:07 -0800

    Gary LaPook writes:
    Sokkia has 7" and 20" theodolites available but I don't know what they
    This website appears to have a lot of information about sureveying and
    surveying instruments.
    On Jan 7, 10:45 am, Paul Hirose  wrote:
    > A couple months ago there was some discussion about theodolites for
    > sextant calibration. I see that Chinese companies are now producing
    > amazingly inexpensive electronic theodolites. How about a new 2-second
    > theodolite for $1100?http://cgi.ebay.com/South-ET-02-Electronic-Theodolite-2-Transit-Brand...
    > This auction ends in a few hours, but the seller seems to keep one of
    > these listed all the time. (The last auction I watched, there was no sale.)
    > The company web site has more details:http://www.southsurveying.net/SouthET.html
    > Accessories include a right angle eyepiece and sun filter.
    > Even cheaper is this theodolite, which claims the same 
    > However, it's not as professionally marketed as the other theodolite.
    > The eBay page is riddled with spelling errors, and unlike the other
    > company, there's no U.S. distributor. You have to buy direct from China.
    > But the $440 price is incredible.
    > Even $1100 is very cheap for a new instrument. You can get a used
    > 1" theodolite like a DKM2A or T2 on eBay, but not for $1100, at least
    > if you want one in good condition from a seller who knows about
    > these things. And if you're interested in celestial, right angle
    > eyepieces are hard to find. In addition, their optical micrometers need
    > careful manipulation and a practiced eye to get good results.
    > For the hobbyist who wants to set up a sextant calibration range,
    > investigate the effects of refraction, or shoot the stars with a
    > theodolite, these new Chinese instruments may be worth a look.
    > --
    > I block messages that contain attachments or HTML.
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