I know people who have used insulators on telephone poles as an artificial
star. Set up your scope during the daytime, and find the sun reflecting
off an insulator (if you can find one)....
Mark
At 1/20/2003, you wrote:
>The concerns cited by Dennis were also echoed on the LX200GPS list. I am in
>no way recommending that vendor. I paid by credit card and am prepared to
>also stop payment if the device has not shipped. I am crossing my fingers
>that will not be necessary. I should note that I contacted the BBB serving
>Kansas and their report does not reflect the level of bad experiences I have
>heard on the newsgroups.
>
>The problem of creating a good star is harder then it seems. The light
>source for a 10" SCT needs to appear no larger than .45 arcseconds or the
>scope will resolve it as a non-point source. I leave to the reader to
>compute the tradeoff of distance vs hole size to get that value. I was quite
>surprised when I did the math. You need a very small round hole and a very
>bright light source. The advantage of the Eztelescope unit was they claim to
>have a very small hole.
>
>If you don't want to take the hassle (risk) with eztelescope.com you can try
>building it yourself. The light source you can get a radio shack (or
>elsewhere). The small hole is more of a problem (see the discussion on
>http://groups.yahoo.com/group/LX200GPS concerning the 25 micron orifices
>available through smallparts.com). That is certainly my plan B.
>
>Rob Hawley
>
>
>
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