Re: [APML] Framing shots (setting circles)

["Glenn Ray" <glennlray@mail.ev1.net>]

Can't speak for the GM200, but the manual setting circles for the G-11 are of no use if you use high-speed slewing (16x).  They will freely rotate with the scope and ruin calibration.  I have no idea why this happens, but it's even documented in the G-11 user manual.  Thank goodness for DSC's.

Glenn Ray
Cypress, TX


---------- Original Message ----------------------------------
From: Gene Horr <genehorr@texas.net>
Reply-To: astro-photo@seds.org
Date: Mon, 09 Sep 2002 11:51:55 -0500

>mstecker wrote:
>> 
>> Losmandy built an expensive mount (GM200) for large telescopes like the C-14
>> that had no manual setting circles.  It used digital setting circles that
>> were extremely inaccurate (+/- 5 degrees),
>
>????  The GM-200 that I used to own had fairly accurate GSCs, assuming that
>you resynced after doing a GEM flip.  Within 1/3 of a degree or so.  This
>mount was manufactured around '97 or '98.  Perhaps the design changed?  Or
>did one of us get a mount on the far side of the bell curve?
>
>Gene Horr
>genehorr@texas.net
>
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