Date   

Re: GTO

Shailesh Trivedi
 

Hello Everyone,

I sincerely thank you very much for your insights. I now have many tools in my toolbox to do PA without worrying about the visibility of Polaris. 

Thanks again,

Shailesh


Re: Drift Alignment To Help With Unguided Images

Ray Gralak
 

Hi Tony,

From the screenshot, your firmware is definitely out of date. You are running P01-11 and should upgrade to P01-14. That probably is not the problem, but it doesn't hurt to have the latest firmware.

As Roland said, using an SCT for unguided imaging at that image scale is going to be challenging because of random shifts in the positioning of the mirror. Those shifts can happen when creating a model that will pollute the model. You can check for this by using APPM to do a 5x verify run using your model. If there is randomness in the setup, the 5x verify results would show that.

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Tony Benjamin
Sent: Saturday, August 29, 2020 11:20 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Noted.



I want spend the time fiddling with this…will get that Planewave 12.5” J



Heres what my warning looks like for upgrading the CP4 firmware:







From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@aol.com> via
groups.io
Sent: August 29, 2020 11:18 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images



No, we have not changed the way the CP4 controllers interface with APCC Pro. However, there is a new version of
APCC Pro that might be what you want to update.



If you are using a C14 for unguided, you may run into mirror shift issues that cannot be solved with modeling. I think
trying to do unguided imaging with such a scope might be stretching things. First you have very long focal length,
next you have an optical/mechanical system that is prone to differential flexure, and then you have possible mirror
shifting, even if it's locked down. Reason for the shift is not because it tilts due to gravity, rather that the entire mirror
slides sideways due to the clearance between the mirror's central hole and the shaft that it rides on. The mirror is
quite heavy and slides around sideways because it is not glued down to the metal shaft that it sits on.



Rolando







-----Original Message-----
From: Tony Benjamin <tonybenjamin@shaw.ca>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 1:09 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Will do, tonight hopefully.



It says I need to contact AP to get the CP4 firmware updated? Might this play into my issue?







Tony



From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@aol.com> via
groups.io
Sent: August 29, 2020 11:08 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images



"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide
pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to
work with.



Rolando







-----Original Message-----
From: Tony Benjamin <tonybenjamin@shaw.ca>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44
with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift
goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in
APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: Drift Alignment To Help With Unguided Images

Ray Gralak
 

Hi Tony,

It says I need to contact AP to get the CP4 firmware updated?
Might this play into my issue?
If APCC is showing that message means you are not running the latest mount firmware. You can download it from the link below. You may need the password from the manual that came with your mount.

https://www.astro-physics.com/software-updates/

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver


-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Tony Benjamin
Sent: Saturday, August 29, 2020 11:09 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Will do, tonight hopefully.



It says I need to contact AP to get the CP4 firmware updated? Might this play into my issue?







Tony



From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@aol.com> via
groups.io
Sent: August 29, 2020 11:08 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images



"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide
pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to
work with.



Rolando







-----Original Message-----
From: Tony Benjamin <tonybenjamin@shaw.ca>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44
with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift
goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in
APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: Drift Alignment To Help With Unguided Images

Bill Long
 

You can update the firmware from the AP website. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Tony Benjamin <tonybenjamin@...>
Sent: Saturday, August 29, 2020, 11:20 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Noted.

 

I want spend the time fiddling with this…will get that Planewave 12.5” J

 

Heres what my warning looks like for upgrading the CP4 firmware:

 

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: August 29, 2020 11:18 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

 

No, we have not changed the way the CP4 controllers interface with APCC Pro. However, there is a new version of APCC Pro that might be what you want to update.

 

If you are using a C14 for unguided, you may run into mirror shift issues that cannot be solved with modeling. I think trying to do unguided imaging with such a scope might be stretching things. First you have very long focal length, next you have an optical/mechanical system that is prone to differential flexure, and then you have possible mirror shifting, even if it's locked down. Reason for the shift is not because it tilts due to gravity, rather that the entire mirror slides sideways due to the clearance between the mirror's central hole and the shaft that it rides on. The mirror is quite heavy and slides around sideways because it is not glued down to the metal shaft that it sits on.

 

Rolando

 

 

 

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 1:09 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Will do, tonight hopefully.

 

It says I need to contact AP to get the CP4 firmware updated? Might this play into my issue?

 

 

 

Tony

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: August 29, 2020 11:08 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

 

"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to work with.

 

Rolando

 

 

 

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44 with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony



Re: GTO

Clayton Yendrey
 

If you have SharpCap Pro, it can perform polar alignment as long as your scope can see the sky withing 5-7dg of the NCP.


Re: Drift Alignment To Help With Unguided Images

Tony Benjamin <tonybenjamin@...>
 

Noted.

 

I want spend the time fiddling with this…will get that Planewave 12.5” J

 

Heres what my warning looks like for upgrading the CP4 firmware:

 

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: August 29, 2020 11:18 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

 

No, we have not changed the way the CP4 controllers interface with APCC Pro. However, there is a new version of APCC Pro that might be what you want to update.

 

If you are using a C14 for unguided, you may run into mirror shift issues that cannot be solved with modeling. I think trying to do unguided imaging with such a scope might be stretching things. First you have very long focal length, next you have an optical/mechanical system that is prone to differential flexure, and then you have possible mirror shifting, even if it's locked down. Reason for the shift is not because it tilts due to gravity, rather that the entire mirror slides sideways due to the clearance between the mirror's central hole and the shaft that it rides on. The mirror is quite heavy and slides around sideways because it is not glued down to the metal shaft that it sits on.

 

Rolando

 

 

 

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 1:09 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Will do, tonight hopefully.

 

It says I need to contact AP to get the CP4 firmware updated? Might this play into my issue?

 

 

 

Tony

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: August 29, 2020 11:08 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

 

"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to work with.

 

Rolando

 

 

 

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44 with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: Drift Alignment To Help With Unguided Images

Roland Christen
 

No, we have not changed the way the CP4 controllers interface with APCC Pro. However, there is a new version of APCC Pro that might be what you want to update.

If you are using a C14 for unguided, you may run into mirror shift issues that cannot be solved with modeling. I think trying to do unguided imaging with such a scope might be stretching things. First you have very long focal length, next you have an optical/mechanical system that is prone to differential flexure, and then you have possible mirror shifting, even if it's locked down. Reason for the shift is not because it tilts due to gravity, rather that the entire mirror slides sideways due to the clearance between the mirror's central hole and the shaft that it rides on. The mirror is quite heavy and slides around sideways because it is not glued down to the metal shaft that it sits on.

Rolando



-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 1:09 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Will do, tonight hopefully.
 
It says I need to contact AP to get the CP4 firmware updated? Might this play into my issue?
 
 
 
Tony
 
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: August 29, 2020 11:08 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images
 
"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to work with.
 
Rolando
 
 
 
-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images
Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44 with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: Drift Alignment To Help With Unguided Images

Tony Benjamin <tonybenjamin@...>
 

Will do, tonight hopefully.

 

It says I need to contact AP to get the CP4 firmware updated? Might this play into my issue?

 

 

 

Tony

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of uncarollo2 <chris1011@...> via groups.io
Sent: August 29, 2020 11:08 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

 

"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to work with.

 

Rolando

 

 

 

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44 with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: Drift Alignment To Help With Unguided Images

Roland Christen
 

"Pretty sure" will only be confirmed if you do what i suggested - do a guider graph for 10 - 12 minutes with guide pulses turned off. See what your guide graph looks like, maybe even post a screen shot so we have something to work with.

Rolando



-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:55 pm
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44 with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: GTO

Roland Christen
 

Yes, I know all too well since we used to set up our scopes at star parties during the daytime. I did similar setups, using my daylight polar alignment method, but before I could really nail it down someone would literally shove me out of the way to get a look thru the eyepiece.

Rolando



-----Original Message-----
From: CurtisC via groups.io <calypte@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 12:48 pm
Subject: Re: [ap-gto] GTO

When I was using my Mach1GTO for outreach (the mount is in an observatory now) it was always my goal to be the first to have one of the bright planets in the scope, well before the sky was dark and Polaris was visible.  I would do a north alignment with a compass.  It helped that we visited the same schools annually, and I got to know how the playground lines were set at any particular school.  I would do Park 1 and Park 2, using a bubble level.  I would then do a go-to to Venus or the Moon (usually one or both were available), center the object by pushing around the tripod legs and fiddling with the azimuth adjuster and latitude adjuster.  Do a Recalc.  Then I'd do a go-to to my planet.  The planet was usually somewhere in the field-of-view with my lowest power eyepiece.  Then I'd center the planet and do Recalc.  If I went back to the Moon or Venus, they were usually good enough for what we were doing.  It could all be done in 5 minutes.  I might refine the alignment later in the evening, but -- as you know if you ever do outreach -- the guests line up very quickly at any scope whose owner looks like they know what they're doing, and I would have to live with whatever alignment I'd achieved in those first few minutes.


Re: Drift Alignment To Help With Unguided Images

Tony Benjamin <tonybenjamin@...>
 

Hi,

Thanks all for the input.

The scope I am currently using is a C11 Edge (the mirror is "locked down" - but who knows??). Image scale is .44 with the ML16200. Hopefully will upgrade to a Planewave 12.5 in the near future and kiss possible mirror shift goodbye :)

Pretty sure the encoders were on - but will double check tonight. I also have tracking and pointing corrections on in APPM.

The only message I've noted of late is that my CP4 firmware needs to be updated?



Tony


Re: GTO

CurtisC
 

When I was using my Mach1GTO for outreach (the mount is in an observatory now) it was always my goal to be the first to have one of the bright planets in the scope, well before the sky was dark and Polaris was visible.  I would do a north alignment with a compass.  It helped that we visited the same schools annually, and I got to know how the playground lines were set at any particular school.  I would do Park 1 and Park 2, using a bubble level.  I would then do a go-to to Venus or the Moon (usually one or both were available), center the object by pushing around the tripod legs and fiddling with the azimuth adjuster and latitude adjuster.  Do a Recalc.  Then I'd do a go-to to my planet.  The planet was usually somewhere in the field-of-view with my lowest power eyepiece.  Then I'd center the planet and do Recalc.  If I went back to the Moon or Venus, they were usually good enough for what we were doing.  It could all be done in 5 minutes.  I might refine the alignment later in the evening, but -- as you know if you ever do outreach -- the guests line up very quickly at any scope whose owner looks like they know what they're doing, and I would have to live with whatever alignment I'd achieved in those first few minutes.


Re: Drift Alignment To Help With Unguided Images

Roland Christen
 

Most likely is that the encoders are turned off.

Next possibility is that there may be some telescope flexing or mirror shifting that cannot be modeled because it's not repeatable enough.

Third possibility is that he may have a very old version of APCC Pro - maybe needs to download the latest version.

Rolando



-----Original Message-----
From: Dean Jacobsen <deanjacobsen@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 11:59 am
Subject: Re: [ap-gto] Drift Alignment To Help With Unguided Images

PHD2 has a good drift alignment tool.  PHD2 is free.

SharpCap has a great polar alignment tool.  I use this tool every session to dial in my polar alignment.  The cost for the “pro” version which has the tool was about $12.  You could use that before you do anything else just to get a good idea of your actual polar alignment.

 It is my understanding from posts by Roland and Ray that polar alignment is not that critical when creating models and that APCC/APPM takes polar alignment induced drift into account when calculating the model.  Perhaps Ray or Roland could remind us of what is considered good enough.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Drift Alignment To Help With Unguided Images

Roland Christen
 

Before you go down a bunch of blind alleys, check your RA and Dec drift rates using a guider program like PHD2 or MaximDL. Bring up a guider graph of the two axes, set the exposures to 2 - 3 seconds and turn off the guide corrections to the mount so that you see only the axis drift rates. Do that first before you do anything else, so that you get a fundamental set of drift curves.

If you get straight line drift trends in both axes, then you should be able to model and get a good tracking rate for at least 10 minutes.
If your RA line is not straight, but wanders back and forth (showing periodic error), then you have probably inadvertently turned your encoders off, so they are not really correcting the mount's tracking rate.

Rolando
P.S. never turn off the encoders on an encoder mount.

-----Original Message-----
From: Tony Benjamin <tonybenjamin@...>
To: main@ap-gto.groups.io
Sent: Sat, Aug 29, 2020 11:13 am
Subject: [ap-gto] Drift Alignment To Help With Unguided Images

I have an AP 1100GTO AE. I have done a 280 pt pointing model. Even with that I can't get even a 2 min sub without star elongation.

So, I'm going to recheck my polar alignment to make sure thats dialed in. But what about drift alignment? How do you go about it? Is there any good sources on this for AP mounts and PEMPro - or other software?

Aside from the above - is there something else I need to do to get at least a 5 min unguided sub?


Re: Drift Alignment To Help With Unguided Images

Ray Gralak
 

Hi Tony,

Can you provide more details about your setup? That is what kind of telescope, camera, image scale, etc.?

-Ray Gralak
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of PEMPro V3: https://www.ccdware.com
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Tony Benjamin
Sent: Saturday, August 29, 2020 9:14 AM
To: main@ap-gto.groups.io
Subject: [ap-gto] Drift Alignment To Help With Unguided Images

I have an AP 1100GTO AE. I have done a 280 pt pointing model. Even with that I can't get even a 2 min sub without
star elongation.

So, I'm going to recheck my polar alignment to make sure thats dialed in. But what about drift alignment? How do
you go about it? Is there any good sources on this for AP mounts and PEMPro - or other software?

Aside from the above - is there something else I need to do to get at least a 5 min unguided sub?


Re: Drift Alignment To Help With Unguided Images

Dean Jacobsen
 

PHD2 has a good drift alignment tool.  PHD2 is free.

SharpCap has a great polar alignment tool.  I use this tool every session to dial in my polar alignment.  The cost for the “pro” version which has the tool was about $12.  You could use that before you do anything else just to get a good idea of your actual polar alignment.

 It is my understanding from posts by Roland and Ray that polar alignment is not that critical when creating models and that APCC/APPM takes polar alignment induced drift into account when calculating the model.  Perhaps Ray or Roland could remind us of what is considered good enough.
--
Dean Jacobsen
http://astrophoto.net/wp/
Image Gallery - http://astrophoto.net/wp/image-gallery/
Astrobin - https://www.astrobin.com/users/deanjacobsen/ 


Re: Drift Alignment To Help With Unguided Images

 

Hi Tony

AP produced a document on DEC and RA Drift Alignment

This is the document I saved off from them.

I think it's also available on their website

On Sat, Aug 29, 2020 at 9:13 AM Tony Benjamin <tonybenjamin@...> wrote:
I have an AP 1100GTO AE. I have done a 280 pt pointing model. Even with that I can't get even a 2 min sub without star elongation.

So, I'm going to recheck my polar alignment to make sure thats dialed in. But what about drift alignment? How do you go about it? Is there any good sources on this for AP mounts and PEMPro - or other software?

Aside from the above - is there something else I need to do to get at least a 5 min unguided sub?



--
Brian 



Brian Valente


Drift Alignment To Help With Unguided Images

Tony Benjamin <tonybenjamin@...>
 

I have an AP 1100GTO AE. I have done a 280 pt pointing model. Even with that I can't get even a 2 min sub without star elongation.

So, I'm going to recheck my polar alignment to make sure thats dialed in. But what about drift alignment? How do you go about it? Is there any good sources on this for AP mounts and PEMPro - or other software?

Aside from the above - is there something else I need to do to get at least a 5 min unguided sub?


Re: Pillars of M16

Terri Zittritsch
 

Thanks Roland, Again, your shots are great.    The Rasa is a special scope.  One of our club members purchased an 11" rasa, and he gets a lot of signal pretty quick at f2.2.    He just purchased one of those 60M pixel CMOS sensors to use with it.    

Another of our club members said he's being sent a Stowaway soon, I guess his number came up, and he's incredibly excited.      


Terri


Re: Serial to bluetooth for CPC3

drgert1
 

@Steve: You have a good point there. It just so happens that all other cabling goes from the laptop to the end of the OTA. Focuser, camera, guide cam. And the connection to the mount serial port was the only one going the other way. Replacing it with BT cleans up the cabling for me considerably.
Clear Skies,
Gert

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