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Re: [APML] Optimum focal length for guidescope?
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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