On Saturday, April 18, 1998 7:11 PM, Andy Wallace wrote:

> Paul--If there were a market, I'll bet JMI could come up with encoders for
> the LX--I've seen a set of JMI encoders on a 20" Obsession dob that are
> dead on. I wish I had never looked through the dob and found out how easy
> it is to find objects using this monster with encoders-- even for a newbee.
> The difference between 10" (my LX 200) and 20" is night and day, so to
> speak (the central star in M-57,etc,etc). I'm going to use the LX for
> imaging and get the dob for viewing-the workmanship in the Obsession is
> like Ken Milburn's.
> Andy
> ----------
> > Subject: Re: [M]: Park facility
> > Date: Saturday, April 18, 1998 11:55 AM
> >
> >
> > >>We recently learned that at the beginning of the LX200 there was an
> > >encoder
> >
>

Obsession uses high resolution directly coupled optical encoders.
The interval between steps is 5.4 arc minutes which defines the
maximum pointing precision at an optimal 0.0 warp factor.



--
Michael Hart
Husen Observatory

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