Re: [APML] ST4 Test Results

["Scott Hammonds" <shammonds@creatorsview.com>]

Emmanuele,
I did use the drift align method described here,
"http://home.dc.rr.com/jimjanusz/Polar%20Alignment.htm";
I only drift aligned for around 6-7 minutes instead of the 15 recommended in
the article. Normally I will go a little longer, but this seemed adequate
for my test. I am not sure of the sensitivity of the ST4 regarding polar
alignment, others may comment here, but I know I have gotten A0's and A1's
with some very pretty field rotation on the corners. <g>
Scott Hammonds

----- Original Message ----- 
From: "Emmanuele Sordini" <vega@bloomingstars.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, January 13, 2004 7:27 PM
Subject: Re: [APML] ST4 Test Results


> Hi Scott,
> congratulations on getting a perfect guiding with such a short FL lens!
>
> Just out of curiosity: how good was your polar aligment? Did you drift
> align (the answer will most likely be "of course", so why am I posing such
> dumb questions), and how accurate was your alignment? Just getting an idea
> how picky the ST-4 is about polar alignment... :-))
>
> Thanks,
> Emmanuele
>
> At 13.55 13/01/2004 -0500, you wrote:
> >Hi APMLr's,
> >I recently performed a test with my ST4 to see if I could guide using a
> >camera lens as my guidescope. After discussions with Jim Janusz and the
> >folks at SBIG I wasn't confident this would work. All of the pertinent
> >details are located on the webpage. This may be old news to some of you,
but
> >I was trying to find a way to limit the weight on my AP400GTO mount. It
is
> >rated at 18lbs max load and I was approaching this limit trying to shoot
> >prime focus shots through my NP101.
> >www.creatorsview.com/test.html The test was successful and I am anxious
to
> >get to Chiefland, Florida next week for a dark sky test.
> >If anyone would like a processing challenge you can find a tiff version
of
> >this image on my links page at
> >http://www.creatorsview.com/astrophoto/links.html The file size is 19mb,
> >just right click the M31 link at the bottom of the page and use the "save
> >as" command.
> >
> >Scott Hammonds
>
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