Re: [APML] A question for you ST-4 experts

[Chris Schur <comets133@yahoo.com>]

Alan, I think my experience is that the worse the
seeing, the less you want the mount to react, and so
change the calibration accordingly.  In good seeing,
you can usually set it for a pretty fast rate.

Chris

--- Alan Voetsch <alanv12952@yahoo.com> wrote:

> Hey all,
> 
> I've got an autoguider calibration question I want
> to lay on you guys.
> 
> First, some history. I've used the Meade 201XT (Rich
> Michaels; where
> are you now?) on my LXs for quite awhile. There has
> been past
> discussion that increasing the calibration numbers
> will result in
> better, smoother guiding. I tried this, and it
> worked on the 201 and
> LX200 mount. Somewhere in the MAPUG archives is an
> article I submitted
> regarding this issue. Ralph Pass is the one who
> originally suggested
> doing this, it also worked for him.
> 
> I wonder if this is worth pursuing on the ST-4 and
> G-11. Has anyone
> checked this out and were there any results worth
> mentioning? I
> currently start calibration with the star roughly
> centered and use '20'
> for calibration numbers at 820mm focal length. That
> moves the star to
> about '75' and '15'. If I started with the star at
> '15' and '85', I
> could use '40' as the calibration entry and keep the
> star on the chip,
> and have twice the movement during calibration.
> Hopefully, this would
> improve guiding performance.
> 
> OK, any insights at all out there?
> 
> Thanks,
> Alan
> 
> SCT Astrophotography:
> http://www.pbase.com/avoetsch/astrophotography
> FS-102 G-11/Gemini:
> http://www.pbase.com/avoetsch12952/tak_fs102
> & http://www.pbase.com/avoetsch12952/fs102
> & http://www.pbase.com/avoetsch12952/takpf
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> http://mail.yahoo.com 
> _______________________________________________
> Astro-Photo mailing list
> Astro-Photo@seds.org
> http://seds.org/mailman/listinfo/astro-photo
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com 
_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo