Re: [APML] Mini Borg 45ED & ST-4 Autoguider

["Stuart Heggie" <stuart.j.heggie@sympatico.ca>]

Joseph - I tried to guide my 800mm newtonian with a 180mm lens and it didn't work. Not saying it
couldn't but I wasn't really interested in spending a lot of film and clear nights figuring out
why. So, one data point for you. Maybe 300mm would do it. Can you put a barlow in the light path?
Then you'd have 600mm guiding 770 and I bet that would work.

Beauty in things exists in the mind that contemplates them.

Stuart
http://www3.sympatico.ca/stuart.j.heggie/Stuart.J.Heggie/
Flesherton, Ontario, Canada

----- Original Message -----
From: "Joseph Schaefer" <schaefer@htva.net>
To: <astro-photo@seds.org>
Sent: Sunday, August 01, 2004 11:16 AM
Subject: [APML] Mini Borg 45ED & ST-4 Autoguider


>
>  Hello everyone,
>
>  I was wondering if anyone on the list is using the Mini Borg 45ED and
> ST-4 for autoguiding? It is only a 300mm FL lens and I would be using
> it to guide a 1040mm FL @ f/8 or 770mm FL @ f/6 (with reducer) TAK
> FS128 refractor. It has been my impression that the guide scope should
> be as close to the imaging FL as possible. But I know practical
> experience is not always the same as theory. I am presently using a
> Vixen 102 (1000mm FL f/10) with a ST-4 and I am looking to reduce the
> weight of my system.
>
>  Any comments or suggestion would be appreciated.
>
> Thanks, Joe Schaefer
>
> www.starfillednights.com
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> Astro-Photo@seds.org
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