Re: 1200GTO and STV guiding


Oct 29, 2002

 


----------------------------

#5922 Oct 29, 2002

Anyone have any experience, tips, or comments on using a SBIG STV with a

>1200GTO for guiding?



Have one with ver 1.06 of firmware and seems to be no more accurate than

the older version 1.02....would version 1.04 be a better option? Seems to

make some large jumps in RA that guiding with the ST8E's internal chip does

not make.



Interesting toy...



Mike J. Shade: mshade@...

Sonoita Hills Observatory, Sonoita Arizona



See work done at the observatory: c3po.cochise.cc.az.us/astro

under the "photographs and images" panel on the left of the screen.



"I like the dark, it's cheap." E. B. Scrooge



International Dark sky Association www.darksky.org "I'm a member, are you?"



----------------------------

#5925 Oct 29, 2002

In a message dated 10/29/02 11:07:32 AM, mshade@... writes:



< >Anyone have any experience, tips, or comments on using a SBIG STV with a

>1200GTO for guiding?



Have one with ver 1.06 of firmware and seems to be no more accurate than

the older version 1.02....would version 1.04 be a better option? Seems to

make some large jumps in RA that guiding with the ST8E's internal chip does

not make.



Interesting toy...



Mike J. Shade: mshade@...

Sonoita Hills Observatory, Sonoita Arizona >>



Mike:

Over the last month or so there has been a thread here on ap-gto, ap-ug, and

APML (Astrophotography Mailing List) concerning the use of the STV as a

guider and more specifically, as a guider with AP mounts, including the

1200GTO. Check the archives of each list for details.



There seems to be an oscillation in DEC corrections that shouldn't be there.

There are oscillations in RA but they are explainable by the periodic error

of the worm. Numerous users have seen these oscillations, some have found wa

ys to negate them.



I agree that the 1.06 firmware doesn't seem any better than the 1.04.



I've been wanting to run some more tests but we've had 14 consecutive days

and nights of clouds and rain. I'm beginning to think I live in the NW

instead of Texas except I can't see any mountains.



Kent Kirkley



----------------------------

#5926 Oct 29, 2002

>

>There seems to be an oscillation in DEC corrections that shouldn't be there.

>There are oscillations in RA but they are explainable by the periodic error

>of the worm. Numerous users have seen these oscillations, some have found wa

>ys to negate them.



Mine seems to be in RA and will work fine but then give big corrections

like from .1 to .3 to 1.9 and then back. The ST8E when guiding through

that does not make these corrections so

suspect that it is something in the STV. Have tried all the standard

tricks from the old ST4 days but does not seem to help. Has ruined many a

promising CCD image. Wasted many nights screwing around with this thing.







Mike J. Shade: mshade@...

Sonoita Hills Observatory, Sonoita Arizona



See work done at the observatory: c3po.cochise.cc.az.us/astro

under the "photographs and images" panel on the left of the screen.



"I like the dark, it's cheap." E. B. Scrooge



International Dark sky Association www.darksky.org "I'm a member, are you?"



----------------------------

#5956 Oct 30, 2002

Hello all,



I am new to this group since I am considering the possibility of

purchasing an AP900GTO mount. My thought was using the STV to guide

my CCD imaging. I wonder if this oscillations will also appear when

using an AP900.



Thanks



Jaume





--- In ap-gto@y..., "Mike J. Shade" mshade@t...> wrote:

>

> >

> >

> >There seems to be an oscillation in DEC corrections that shouldn't

be there.

> >There are oscillations in RA but they are explainable by the

periodic error

> >of the worm. Numerous users have seen these oscillations, some

have found wa

> >ys to negate them.

>

> Mine seems to be in RA and will work fine but then give big

corrections

> like from .1 to .3 to 1.9 and then back. The ST8E when guiding

through

> that does not make these corrections so

> suspect that it is something in the STV. Have tried all the

standard

> tricks from the old ST4 days but does not seem to help. Has ruined

many a

> promising CCD image. Wasted many nights screwing around with this

thing.

>

>

>

> Mike J. Shade: mshade@t...

> Sonoita Hills Observatory, Sonoita Arizona

>

> See work done at the observatory: c3po.cochise.cc.az.us/astro

> under the "photographs and images" panel on the left of the screen.

>

> "I like the dark, it's cheap." E. B. Scrooge

>

> International Dark sky Association www.darksky.org "I'm a member,

are you?"



----------------------------

#5957 Oct 30, 2002

I've never had the problem on my 1200. Might be luck of the draw ...



- Vince



--- jaumecastella jaume.castella@...> wrote: > Hello all,

>

> I am new to this group since I am considering the possibility of

> purchasing an AP900GTO mount. My thought was using the STV to guide

> my CCD imaging. I wonder if this oscillations will also appear when

> using an AP900.

>

> Thanks

>

> Jaume

>

>

>

> --- In ap-gto@y..., "Mike J. Shade" mshade@t...> wrote:

> >

> > >

> > >

> > >There seems to be an oscillation in DEC corrections that shouldn't

> be there.

> > >There are oscillations in RA but they are explainable by the

> periodic error

> > >of the worm. Numerous users have seen these oscillations, some

> have found wa

> > >ys to negate them.

> >

> > Mine seems to be in RA and will work fine but then give big

> corrections

> > like from .1 to .3 to 1.9 and then back. The ST8E when guiding

> through

> > that does not make these corrections so

> > suspect that it is something in the STV. Have tried all the

> standard

> > tricks from the old ST4 days but does not seem to help. Has ruined

> many a

> > promising CCD image. Wasted many nights screwing around with this

> thing.

> >

> >

> >

> > Mike J. Shade: mshade@t...

> > Sonoita Hills Observatory, Sonoita Arizona

> >

> > See work done at the observatory: c3po.cochise.cc.az.us/astro

> > under the "photographs and images" panel on the left of the screen.

> >

> > "I like the dark, it's cheap." E. B. Scrooge

> >

> > International Dark sky Association www.darksky.org "I'm a member,

> are you?"

>

>

> To UNSUBSCRIBE, or for general information on the ap-gto list

> see groups.yahoo.com/group/ap-gto

>

> Your use of Yahoo! Groups is subject to docs.yahoo.com/info/terms/

>

>





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----------------------------

#5958 Oct 30, 2002

jaumecastella wrote:

> 0I am new to this group since I am considering the possibility

> of purchasing an AP900GTO mount. My thought was using the STV

> to guide my CCD imaging. I wonder if this oscillations will

> also appear when using an AP900.



I'll let you know, as I just ordered an STV deluxe with e-finder, to

be used with my AP600 and AP900 mounts.



Paul



----------------------------

#5976 Nov 2, 2002

I've used an STV on an AP400GTO, AP900GTO and AP1200GTO and have

never seen these oscillations. Based on the trouble SBIG is having

trying to locate someone with the issue so they have a test case to

troubleshoot, I think it's rather rare.

Ben

--- In ap-gto@y..., "jaumecastella" jaume.castella@u...> wrote:

> Hello all,

>

> I am new to this group since I am considering the possibility of

> purchasing an AP900GTO mount. My thought was using the STV to

guide

> my CCD imaging. I wonder if this oscillations will also appear

when

> using an AP900.

>

> Thanks

>

> Jaume

>

>

>

> --- In ap-gto@y..., "Mike J. Shade" mshade@t...> wrote:

> >

> > >

> > >

> > >There seems to be an oscillation in DEC corrections that

shouldn't

> be there.

> > >There are oscillations in RA but they are explainable by the

> periodic error

> > >of the worm. Numerous users have seen these oscillations, some

> have found wa

> > >ys to negate them.

> >

> > Mine seems to be in RA and will work fine but then give big

> corrections

> > like from .1 to .3 to 1.9 and then back. The ST8E when guiding

> through

> > that does not make these corrections so

> > suspect that it is something in the STV. Have tried all the

> standard

> > tricks from the old ST4 days but does not seem to help. Has

ruined

> many a

> > promising CCD image. Wasted many nights screwing around with

this

> thing.

> >

> >

> >

> > Mike J. Shade: mshade@t...

> > Sonoita Hills Observatory, Sonoita Arizona

> >

> > See work done at the observatory:

c3po.cochise.cc.az.us/astro

> > under the "photographs and images" panel on the left of the

screen.

> >

> > "I like the dark, it's cheap." E. B. Scrooge

> >

> > International Dark sky Association www.darksky.org "I'm a

member,

> are you?"


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