[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]
Re: [APML] Calibrating STV axes independently
Don, Steve,
Thanks for the information on the prom update to enable separate axis
calibration speeds.
I was wondering if you think the STV is more sensitive and capable of
guiding on dimmer stars?
The deluxe version is very tempting but I wouldn't spend the extra money
unless its capable of
guiding on dimmer stars.
I have not been successful in guiding my C11 / GEG /ST-4 configuration. I
can't get the star value above
5. I plan on trying the software that came with the guider on my laptop to
see what the guider is seeing.
With the trouble I am having with the ST-4 I fear that I wouldn't be able
to get passed the "Seagull" shaped star problem you mentioned.
Thanks, Joe.
----- Original Message -----
From: steve banbury <banburys@sonic.net>
To: <astro-photo@seds.org>
Sent: Thursday, June 13, 2002 11:14 PM
Subject: Re: [APML] Calibrating STV axes independently
> Joesph--I'd second what Don says.
> I have had some excellent results with my STV (or -V as Jim calls it)!
> It is very picky about round stars. "Seagull" shaped stars associated with
a
> Lumicon GEG and a pickoff point
> on the camera side of the focal reducing lens in the GEG drove my STV
crazy. Use
> of a Lumicon 2.5x
> focal reducer on the f10 pickoff point in front of the GEG reducing lens
> completely eliminated that problem.
>
> The eFinder mode of the STV is vastly easier to use than the ST4. And a
135 mm
> f2.8 Nikon telephoto that can be
> purchased used for about $40 or less will guide a 2000 mm scope with no
problem.
> Except of course if the scope
> is an SCT with mirror shift. I had to learn this fact the hard way.
>
> I switched to a refractor to allow me to catch some of the widefield
objects,
> and to benefit from the eFinder capability of the STV. I know the
independent
> calibration of the 2 axes is the reason for the version 1.04 download
software
> provided, and when I get this one last issue sorted out (and only then)
I'll
> probably sell my ST4!
>
> Steve
>
> westergren wrote:
>
> > Joseph,
> > My STV has so many features packed into it, in ROM (or PROM) that
originally
> > SBIG was running out of room to include the independant axis
calibration.
> > They figured out how to include it about a year after the STV became
> > available. The upgrade to the ROM program (downloadable via the
internet)
> > is also a feature that is not available to the ST-4.
> >
> > I have experience with both the ST-4 and STV. They both guide to give
great
> > astrophotography (pin point stars), but the extra features of the STV
make
> > it a remarkable and much more useful camera/autoguider. Is it worth the
> > extra $? It is if you have the extra $.
> > Don
>
>
> -- 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>