Re: [APML] Traveler as guider scope?

[stephen pitt <lthuedk@pe.net>]

Gene: Thanks. I now know my bridged, four-ring overkill is "normal" thinking
for this group.

Stephen

Gene Horr wrote:

> One other note about using relatively heavy instruments as guide scopes.
> My experience is with a 3" triplet f/6 and a 4" doublet f/8.
>
> Whether mounted bolted to the main tube, or using the Losmany DSS, I
> always had flexure when using one tube holder.  The only I found to
> eliminate flexure with this setup is with two tube holders mounted
> as far apart as possible and the clamshells bolted _tight_.
>
> As others have mentioned, in many respects a small light 50mm - 80mm
> f/9 - f/12 works almost just as well and has far fewer flexure problems
> assuming quality focuser, etc.  Yes, guide stars are fewer/dimmer, but
> you can now add adjustable solutions that will not introduce flexure
> problems.
>
> Gene Horr
> genehorr@texas.net
>
> --  APML Archives at <http://astro.umsystem.edu/apml/>  ---
>              Unsubscribe at <majordomo@seds.org>




--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>