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Gary LaPook writes:

Sokkia has 7" and 20" theodolites available but I don't know what they
cost.


http://www.sokkia.com/

This website appears to have a lot of information about sureveying and
surveying instruments.

http://www.pobonline.com/CDA/Archives/

gl

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 
accuracy:http://cgi.ebay.com/NEW-LQET-102-2-Digital-Theodolite_W0QQitemZ290195...
>
> 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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