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Re: [APML] Optimum focal length for guidescope?

Alan - that does sound like a lot to ask of your TV85! The fork mount 
carrying that scope and the autoguider would be something to see too!

Stuart

Alan Voetsch wrote:

>Hey Stuart,
>
>--- Michael Stecker <mstecker@dslextreme.com> wrote:
>  
>
>>Richard Schwartz once told me that you could get good guiding with
>>the ST-4
>>with a guide scope of 1/2 the focal length of the one used for the
>>photo.  I
>>routinely guided my 1085 mm focal length telescope with an ST-4 on a
>>guide scope of 900 mm.
>>    
>>
>
>That's about right. I tried using a 700mm guidescope (my 85's
>guidescope) to guide my 12" LX200 (3050mm f/l) and it just wasn't
>enough. That's less than 1/4 the focal length, half might be
>sufficient.
>
>Alan
>
>
>
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