Date   

Re: C11 on a 600e mount?

mpbrada
 

Thanks, Dan!

--- In ap-gto@..., "d_ankeney" <3spencer2@...> wrote:

--- In ap-gto@..., "mpbrada" <mpbrada@> wrote:

I'm just wondering if anyone out there has had any experience with
this particular combination and whether the 600e is up to supporting a
C11 for visual work.
I use a C11 on a 600E and it is fine for visual use as long as it is
well balanced.

Dan


Re : Re: accuracy of PAS

gilovision2@...
 

Kent is right,



the polarscope needs to be adjusted for optimal results.

Once carefully adjusted, I can rotate the RA axis and polaris stays  hidden behind the center of the reticle. This is a good proof of accuracy, and it can be done each time the mount is moved or if you suspect your polarscope is miscentered. Then I polar align with the complete mount loaded, to prevent any unexpected latitude flop.



With a simple polarscope alignment with the PASILL4 and my 900, I can do more than 5 hours of imaging with the 155, STL and TCC, with no sign of field rotation. 5 hours of imaging means more than 6 hours of tracking, if you include delay between exposures, refocusing....



Gilles


-----E-mail d'origine-----
De : kgkirkley@...
A : ap-gto@...
Envoyé le : Sa, 29 Décembre 2007 14:18
Sujet : Re: [ap-gto] Re: accuracy of PAS







To improve the accuracy of polar alignment scopes, they should be
boresighted.
When they come from 'the factory' they are relatively accurate but can be
improved by adjusting them to your specific mount.

To do this one needs to point the mount with PAS installed at an infinite
terrestrial object like a distant church steeple, communication tower, etc. The
polar axis is then rotated round and round while looking through the PAS. The
distant object should stay exactly centered in the PAS field of view. Any
movement or wobble indicates it is not exactly aligned. Moving the reticle is done
by carefully adjusting the three small screws around eyepiece of the PAS. It
is best to loosen one and tighten another and do not apply too much pressure or
the reticle can be cracked.

I perform the above adjustment without any OTA, counterweights or
counterwieght shaft on the mount. I also place my AP1200GTO on a rather crude 'plywood
wedge' to tip it forward to be able to easily acquire a distant terrestrial
object.

Kent Kirkley

**************************************
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[Non-text portions of this message have been removed]






[Non-text portions of this message have been removed]


Re: polar scope vignetting in AP1200GTO

Muhammed Samir Kharusi
 

This vignetting business may explain why I seemed to be the only one
having problems seeing the second and third stars when I queried the
matter here recently. Perhaps most, or all of the respondents who had
no problems with seeing the second and third stars were not using an
AP1200. Frankly, I find the PAS not up to the $10,000+ standard of the
AP1200, whether it is because of vignetting or (what I suspected
initially) an aperture that is too small. I think we would all be
better off if AP produces a 1" aperture PAS for the 1200, so that we
can easily see the second star at lower latitudes. I am at 23deg N and
the only time I see the second star in these small aperture PAS's is
when I am at a high altitude site with the sky pristine down to the
horizon. We always have a lot of dust haze at lower altitudes. But I do
not take the AP1200 into such remote locations, so I did not suspect
vignetting tp be the culprit. My other PAS's also had similar problems
at lower altitudes, and there was nothing to vignet them.
--- In ap-gto@..., "Jeff" <jlc@...> wrote:

Wait.. I believe I'm referring to the PASILL4 since it has the 2005
epoch.
(its at home though so I cant check for sure.)


Re: C11 on a 600e mount?

d_ankeney <3spencer2@...>
 

--- In ap-gto@..., "mpbrada" <mpbrada@...> wrote:

I'm just wondering if anyone out there has had any experience with
this particular combination and whether the 600e is up to supporting a
C11 for visual work.
I use a C11 on a 600E and it is fine for visual use as long as it is
well balanced.

Dan


Re: AP mount backlash settings and autoguiding

roy uyematsu <roystarman@...>
 

As far as I know the backlash works only in guide mode. Normally don't need
it in Slews



_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
janmclare
Sent: Saturday, December 29, 2007 7:51 AM
To: ap-gto@...
Subject: [ap-gto] AP mount backlash settings and autoguiding





Hi,

Does anyone know when you fine tune the backlash setting with the
handcontroller if it is applied when autoguiding cailbration ? and
autoguiding or is it just for slewing/pointing ?

Jan


AP mount backlash settings and autoguiding

janmclare
 

Hi,

Does anyone know when you fine tune the backlash setting with the
handcontroller if it is applied when autoguiding cailbration ? and
autoguiding or is it just for slewing/pointing ?


Jan


Re: C11 on a 600e mount?

Paul Gustafson
 

"mpbrada" <mpbrada@...> wrote:

I'm just wondering if anyone out there has had any experience with
this particular combination and whether the 600e is up to supporting a
C11 for visual work.
It should handle the C-11 just fine.

Paul Gustafson


Re: accuracy of PAS

Pierre Henrotay
 

Hi Gerald,
we both have experience of the Vixen (Atlux/Sphinx) polar scope and
like it; however I must say that I am not desperate in getting a fair
alignment (ie <5 arcmin) with the PASILL4 (Losmandy-made). I spent some
time yesterday and - by chance ? - was pretty close to true north as
PEMPRo and PoleAlignMax confirmed. Probably a question of patience. But
again, having a Vixen-like or Tak-like polar scope would be great.
Pierre

--- In ap-gto@..., Gerald Sargent <sargentg@...> wrote:

The PAS's I have used show that it is the graticule that
is the key. The etched ones, edge illuminated are the
only usable ones in the S Hemisphere. Having said that
the printed graticule of the Vixen PAS is to me a better
alignment tool than the "Losmandy-AP". If AP were to
produce a better etched graticule it could significantly
improve matters for all.


Re: accuracy of PAS

Kent Kirkley
 

To improve the accuracy of polar alignment scopes, they should be
boresighted.
When they come from 'the factory' they are relatively accurate but can be
improved by adjusting them to your specific mount.

To do this one needs to point the mount with PAS installed at an infinite
terrestrial object like a distant church steeple, communication tower, etc. The
polar axis is then rotated round and round while looking through the PAS. The
distant object should stay exactly centered in the PAS field of view. Any
movement or wobble indicates it is not exactly aligned. Moving the reticle is done
by carefully adjusting the three small screws around eyepiece of the PAS. It
is best to loosen one and tighten another and do not apply too much pressure or
the reticle can be cracked.

I perform the above adjustment without any OTA, counterweights or
counterwieght shaft on the mount. I also place my AP1200GTO on a rather crude 'plywood
wedge' to tip it forward to be able to easily acquire a distant terrestrial
object.

Kent Kirkley



**************************************
See AOL's top rated recipes
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)


accuracy of PAS

Gerald Sargent <sargentg@...>
 

The PAS's I have used show that it is the graticule that
is the key. The etched ones, edge illuminated are the
only usable ones in the S Hemisphere. Having said that
the printed graticule of the Vixen PAS is to me a better
alignment tool than the "Losmandy-AP". If AP were to
produce a better etched graticule it could significantly
improve matters for all.


C11 on a 600e mount?

mpbrada
 

I'm just wondering if anyone out there has had any experience with
this particular combination and whether the 600e is up to supporting a
C11 for visual work.

Thanks!

Mark


Re: polar scope vignetting in AP1200GTO

Jeff <jlc@...>
 

Wait.. I believe I'm referring to the PASILL4 since it has the 2005 epoch.
(its at home though so I cant check for sure.)



_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
Jeff
Sent: Friday, December 28, 2007 3:25 PM
To: ap-gto@...
Subject: RE: [ap-gto] Re: polar scope vignetting in AP1200GTO



While we are talking about the polar scope...

Fwiw, I plugged it into the mount once, and got a yellow light (iirc) on the
CP3 box.
(Maybe it wasnt a yellow light, but I had to power-cycle the mount.)

I was thinking there is a spot where the connector can short out. Maybe it
was static. Dunno.
Maybe this is just one experience.

Now I use it only with the battery.

I have the PASILL3 and adapter - circa 2005.

Seeing the two outside stars are difficult -- they are dimmer than polaris.
I just use averted vision.


_____

From: ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com
[mailto:ap-gto@yahoogroups. <mailto:ap-gto%40yahoogroups.com> com] On Behalf
Of
Eric Baumgartner
Sent: Friday, December 28, 2007 5:05 AM
To: Astro-Physics GTO egroup
Subject: Re: [ap-gto] Re: polar scope vignetting in AP1200GTO

Hi, Mark:

Well, I am heartened to learn that it's not just me!

I'm going to try to quantify the amount of vignetting this holiday weekend
by setting up the 1200 mount in daytime, sighting through the polar scope,
and mapping just where the vignetting kicks in on the field of view.

I will report back to the group.

Eric Baumgartner

On 12/28/07 6:54 AM, "Mark Squicquero" <docsquic@sbcglobal.
<mailto:docsquic%40sbcglobal.net> net> wrote:

Eric,

I have a 1200 but my polar scope is an older Losmandy, which is supposed
to
be very similar to the Passill3. There is definite vignetting when trying
to
see the 2nd and 3rd stars. I have to go through some real contortions and
turn off the reticle sometimes just to catch a hint of the 3rd star.
Sounds
like a good winter project for Rolando :-)

Mark


Re: polar scope vignetting in AP1200GTO

Jeff <jlc@...>
 

While we are talking about the polar scope...

Fwiw, I plugged it into the mount once, and got a yellow light (iirc) on the
CP3 box.
(Maybe it wasnt a yellow light, but I had to power-cycle the mount.)

I was thinking there is a spot where the connector can short out. Maybe it
was static. Dunno.
Maybe this is just one experience.

Now I use it only with the battery.

I have the PASILL3 and adapter - circa 2005.

Seeing the two outside stars are difficult -- they are dimmer than polaris.
I just use averted vision.



_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
Eric Baumgartner
Sent: Friday, December 28, 2007 5:05 AM
To: Astro-Physics GTO egroup
Subject: Re: [ap-gto] Re: polar scope vignetting in AP1200GTO



Hi, Mark:

Well, I am heartened to learn that it's not just me!

I'm going to try to quantify the amount of vignetting this holiday weekend
by setting up the 1200 mount in daytime, sighting through the polar scope,
and mapping just where the vignetting kicks in on the field of view.

I will report back to the group.

Eric Baumgartner

On 12/28/07 6:54 AM, "Mark Squicquero" <docsquic@sbcglobal.
<mailto:docsquic%40sbcglobal.net> net> wrote:

Eric,

I have a 1200 but my polar scope is an older Losmandy, which is supposed
to
be very similar to the Passill3. There is definite vignetting when trying
to
see the 2nd and 3rd stars. I have to go through some real contortions and
turn off the reticle sometimes just to catch a hint of the 3rd star.
Sounds
like a good winter project for Rolando :-)

Mark


Re: Vista - is it compatible with all our AP astronomy software?

Woodwind
 

I would ask whether you were planing to do the image processing with the laptop.

If not, then you can afford to major on battery life and worry less about processing power. Just use it for controlling scope and storing images etc and then download to a PC for working on at your leisure later.

Might be worth thinking about.

Murray

uthin8er <lleege@...> wrote: If the intended use is for astro, in the field, look for the longest
battery life. I have a Dell XPS1710 and it will chew through a battery
in about 45 minutes. I will second the XP OS as well.

--- In ap-gto@..., "sink45ny" <sink45ny@...> wrote:
>
> I am ordering a laptop and want to know what to get.
>
> Thank You
>


Re: Vista - is it compatible with all our AP astronomy software?

uthin8er <lleege@...>
 

If the intended use is for astro, in the field, look for the longest
battery life. I have a Dell XPS1710 and it will chew through a battery
in about 45 minutes. I will second the XP OS as well.

--- In ap-gto@..., "sink45ny" <sink45ny@...> wrote:

I am ordering a laptop and want to know what to get.

Thank You


Re: Vista - is it compatible with all our AP astronomy software?

roy uyematsu <roystarman@...>
 

I would get XP pro or media center vs. Vista at the moment. Vista is still
not fully supported and there seems to be problems with the User Access
Permissions and installing some of the software packages. However Service
Pack 1 should be available in the near future and I hope it fixes a lot of
the issues. Down the road you can always upgrade to Vista if you decide
there is a need.



_____

From: ap-gto@... [mailto:ap-gto@...] On Behalf Of
sink45ny
Sent: Friday, December 28, 2007 1:00 PM
To: ap-gto@...
Subject: [ap-gto] Vista - is it compatible with all our AP astronomy
software?



I am ordering a laptop and want to know what to get.

Thank You


Vista - is it compatible with all our AP astronomy software?

sink45ny <sink45ny@...>
 

I am ordering a laptop and want to know what to get.

Thank You


Re: polar scope vignetting in AP1200GTO

Eric Baumgartner
 

Hi, Mark:

Well, I am heartened to learn that it's not just me!

I'm going to try to quantify the amount of vignetting this holiday weekend
by setting up the 1200 mount in daytime, sighting through the polar scope,
and mapping just where the vignetting kicks in on the field of view.

I will report back to the group.

Eric Baumgartner

On 12/28/07 6:54 AM, "Mark Squicquero" <docsquic@...> wrote:

Eric,

I have a 1200 but my polar scope is an older Losmandy, which is supposed to
be very similar to the Passill3. There is definite vignetting when trying to
see the 2nd and 3rd stars. I have to go through some real contortions and
turn off the reticle sometimes just to catch a hint of the 3rd star. Sounds
like a good winter project for Rolando :-)

Mark


Re: polar scope vignetting in AP1200GTO [was: ACcuracy of PASILL4]

Mark Squicquero
 

Eric,

I have a 1200 but my polar scope is an older Losmandy, which is supposed to be very similar to the Passill3. There is definite vignetting when trying to see the 2nd and 3rd stars. I have to go through some real contortions and turn off the reticle sometimes just to catch a hint of the 3rd star. Sounds like a good winter project for Rolando :-)

Mark


Re: polar scope vignetting in AP1200GTO [was: Accuracy of PASILL4]

Dean S
 

I used this same polar scope on my MI-250 for several years and really liked
the results with that mount. I just recently used one with my new AP1200
for the first set up and did not notice in difference in viewing thru it.
However if it is clear tonight I will look thru it again and see if I notice
anything.

I believe I would rather put up with a bit of vignetting than to assemble my
set up at after dark.

Dean

----- Original Message -----
From: <kgkirkley@...>
To: <ap-gto@...>
Sent: Thursday, December 27, 2007 4:29 PM
Subject: Re: [ap-gto] polar scope vignetting in AP1200GTO [was: Accuracy of
PASILL4]



In a message dated 12/27/07 3:17:50 PM, lkdodd@... writes:


I find vignetting when then scope is used with the dec axis attached, I
roughly get the SCP without the dec axis attached,gives a better view.
Then
fine tune with the dec axis, couter weights etc attched. I too rely
heavily on
the polar finder scope.
My 2 cents worth......

I believe it is best to polar align with the mount completely loaded, ie.
completely assembled, counterweights and OTA. While there 'shouldn't' be any
difference between a loaded and unloaded mount, I've found that there is.

I don't know about any vignetting of the polar scope field with the 1200,
but
it might be.

Kent Kirkley


**************************************
See AOL's top rated recipes
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)






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