Simple design
<http://www.philharrington.net/scotch.htm>
a little more complex and accurate
<http://www.astunit.com/tonkinsastro/atm/projects/scotch.htm>
Chuck Norcutt
Allen Coltrin wrote:
> Keep me up to date in this. I wouldn't miss this for anything. ANYTHING
> (happy emphasis).
>
> Allen
>
> ----Original Message Follows----
> From: AG Schnozz <agschnozz@xxxxxxxxx>
> Reply-To: olympus@xxxxxxxxxx
> To: olympus@xxxxxxxxxx
> Subject: [OM] Re: astropotography
> Date: Fri, 2 Mar 2007 18:20:34 -0800 (PST)
>
>
> Mr Spock wrote:
> > Anything beyond these two items requires that the camera be guided,
> > typically by mounting it on a telescope which is on a clock driven
> > equatorial mount with some means of overriding the clock frequency
> > to allow for tracking errors. If exposures are very short (as in a
> > few minutes) it may be possible to use a simple device called
> > a "barn door mount" which is just two boards hinged together with
> > one being rotated with respect to the other by a tangent screw.
>
> I'm in total agreement here. A simple barn-door tracker costs about
> five bucks to make and an hour of work. I've been thinking about
> making the more advanced version and even throwing an electric motor
> drive on it. I want to be prepared for the next major round of
> auroras.
>
> AG
>
>
>
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