Topics

Upgrade Scope Suggestions for Imaging


Bruce Donzanti
 

I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.


Greg Salyer
 

12.5" Planewave - no question about it.

 

Greg

 

From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Bruce Donzanti
Sent: Sunday, December 6, 2020 1:07 PM
To: main@ap-gto.groups.io
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging

 

I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.


Bill Long
 

What focal length are you looking for? The 12.5 Planewave is likely something to look at. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:06 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging
 
I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.


Bruce Donzanti
 

At least 2500mm

On Sun, Dec 6, 2020 at 1:31 PM Bill Long <bill@...> wrote:
What focal length are you looking for? The 12.5 Planewave is likely something to look at. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:06 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging
 
I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.


 

Planewave cdk14 is about 10k right now

On Sun, Dec 6, 2020 at 10:56 AM Bruce Donzanti <donza2735@...> wrote:
At least 2500mm

On Sun, Dec 6, 2020 at 1:31 PM Bill Long <bill@...> wrote:
What focal length are you looking for? The 12.5 Planewave is likely something to look at. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:06 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging
 
I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.

--
Brian 



Brian Valente


Bill Long
 

The Planewave 12.5 is right up your alley then. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:56 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Upgrade Scope Suggestions for Imaging
 
At least 2500mm

On Sun, Dec 6, 2020 at 1:31 PM Bill Long <bill@...> wrote:
What focal length are you looking for? The 12.5 Planewave is likely something to look at. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:06 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging
 
I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.


Bill Long
 

I see $12,500. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Brian Valente <bvalente@...>
Sent: Sunday, December 6, 2020 11:04 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Upgrade Scope Suggestions for Imaging
 
Planewave cdk14 is about 10k right now

On Sun, Dec 6, 2020 at 10:56 AM Bruce Donzanti <donza2735@...> wrote:
At least 2500mm

On Sun, Dec 6, 2020 at 1:31 PM Bill Long <bill@...> wrote:
What focal length are you looking for? The 12.5 Planewave is likely something to look at. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:06 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging
 
I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.

--
Brian 



Brian Valente


Bruce Donzanti
 

Thanks for the suggestion.  I'll check it out.



On Sun, Dec 6, 2020 at 2:10 PM Bill Long <bill@...> wrote:
The Planewave 12.5 is right up your alley then. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:56 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Upgrade Scope Suggestions for Imaging
 
At least 2500mm

On Sun, Dec 6, 2020 at 1:31 PM Bill Long <bill@...> wrote:
What focal length are you looking for? The 12.5 Planewave is likely something to look at. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Sunday, December 6, 2020 10:06 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: [ap-gto] Upgrade Scope Suggestions for Imaging
 
I currently use a C11" EdgeHD with an 80mm Stellarvue APO triplet piggybacked onto it in my observatory.  The C11 sits on an AP1100 mount which is on an adjustable Pier Tech steel pier sitting on a cement pier which runs several feet underground up to the observatory.  So, the C11 is essentially 10 feet above the observatory floor.  However, I have grown weary of constant mirror shifting and flopping issues.  While I intend to keep it and fix the problem, I want to explore possible scope upgrades from the C11" EdgeHD despite it being very popular and producing great images.  My skies are Bortle 6 with average seeing.  I'd appreciate any suggestions, not going above $10k.


Gary Steffens
 

Bruce, another suggestion would be the Astro-Tech/TPO/GSO 14" RC OTA. I have the 16" version. It has excellent optics and the truss design is very stable and strong. The focuser that comes with it is only good for visual use so you would need to get a better one for imaging. I have the Feather Touch focuser which works great.
Yes, it isn't a Planewave and I can't speak to its advantages, but I'm very happy with my setup and I get great images. 
Cheers,
Gary


Bruce Donzanti
 

Thanks for your input, Gary.....appreciate the suggestion.  I will check it out.

Bruce

On Sun, Dec 6, 2020 at 10:47 PM Gary Steffens via groups.io <gwsteffens=yahoo.com@groups.io> wrote:
Bruce, another suggestion would be the Astro-Tech/TPO/GSO 14" RC OTA. I have the 16" version. It has excellent optics and the truss design is very stable and strong. The focuser that comes with it is only good for visual use so you would need to get a better one for imaging. I have the Feather Touch focuser which works great.
Yes, it isn't a Planewave and I can't speak to its advantages, but I'm very happy with my setup and I get great images. 
Cheers,
Gary


George LaBelle
 

Why not lock the mirror and add an Optec or Starlight Instruments focuser on the back?
--
George
Prineville, Oregon


Bruce Donzanti
 

I am considering all options like these, including the Optec secondary fastFocus system.

Thanks

On Mon, Dec 7, 2020 at 8:43 AM George LaBelle <george.labelle@...> wrote:
Why not lock the mirror and add an Optec or Starlight Instruments focuser on the back?
--
George
Prineville, Oregon


Worsel
 

Bruce

All PW Corrected Dall-Kirkhams come with a manual Hedrick focuser, but PC control of the focuser, including temperature compensation is about an added $1000US.  You can add that at a later date.

AG Optical DKs come with an Optec TCF-3Si.  I have a 14.5" AGOS.

Because of the fixed primary and spherical secondary, Corrected Dall-Kirkhams are relatively easy to collimate and hold collimation well.

The following is only pertinent if you have similar situation at your location.

I have a friend with a PW 12.5, which is a closed tube OTA. He gets great images from it.  However, he lives below a mesa top in western Colorado.  He gets katabatic winds (drainage flow from the cold mesa top downslope) that significantly impacts his seeing much of the time.  Also some vibration impacts unless the OTA happens to be pointed directly into or directly away from the wind.  The bigger PW OTAs are all open truss as are the AG Optical Dall-Kirkhams and many RCs.

Bryan


Bill Long
 

Planewave is leagues better than that scope. No offense. 


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Gary Steffens via groups.io <gwsteffens@...>
Sent: Sunday, December 6, 2020 7:47 PM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Upgrade Scope Suggestions for Imaging
 
Bruce, another suggestion would be the Astro-Tech/TPO/GSO 14" RC OTA. I have the 16" version. It has excellent optics and the truss design is very stable and strong. The focuser that comes with it is only good for visual use so you would need to get a better one for imaging. I have the Feather Touch focuser which works great.
Yes, it isn't a Planewave and I can't speak to its advantages, but I'm very happy with my setup and I get great images. 
Cheers,
Gary


Bruce Donzanti
 

Thanks for the info, Bryan.  This is very helpful.


On Mon, Dec 7, 2020 at 10:11 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:
Bruce

All PW Corrected Dall-Kirkhams come with a manual Hedrick focuser, but PC control of the focuser, including temperature compensation is about an added $1000US.  You can add that at a later date.

AG Optical DKs come with an Optec TCF-3Si.  I have a 14.5" AGOS.

Because of the fixed primary and spherical secondary, Corrected Dall-Kirkhams are relatively easy to collimate and hold collimation well.

The following is only pertinent if you have similar situation at your location.

I have a friend with a PW 12.5, which is a closed tube OTA. He gets great images from it.  However, he lives below a mesa top in western Colorado.  He gets katabatic winds (drainage flow from the cold mesa top downslope) that significantly impacts his seeing much of the time.  Also some vibration impacts unless the OTA happens to be pointed directly into or directly away from the wind.  The bigger PW OTAs are all open truss as are the AG Optical Dall-Kirkhams and many RCs.

Bryan


Bill Long
 

The AG Optical has the TCF-3Si as an option these days, not as standard equipment.   


From: main@ap-gto.groups.io <main@ap-gto.groups.io> on behalf of Bruce Donzanti <donza2735@...>
Sent: Monday, December 7, 2020 9:23 AM
To: main@ap-gto.groups.io <main@ap-gto.groups.io>
Subject: Re: [ap-gto] Upgrade Scope Suggestions for Imaging
 
Thanks for the info, Bryan.  This is very helpful.


On Mon, Dec 7, 2020 at 10:11 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:
Bruce

All PW Corrected Dall-Kirkhams come with a manual Hedrick focuser, but PC control of the focuser, including temperature compensation is about an added $1000US.  You can add that at a later date.

AG Optical DKs come with an Optec TCF-3Si.  I have a 14.5" AGOS.

Because of the fixed primary and spherical secondary, Corrected Dall-Kirkhams are relatively easy to collimate and hold collimation well.

The following is only pertinent if you have similar situation at your location.

I have a friend with a PW 12.5, which is a closed tube OTA. He gets great images from it.  However, he lives below a mesa top in western Colorado.  He gets katabatic winds (drainage flow from the cold mesa top downslope) that significantly impacts his seeing much of the time.  Also some vibration impacts unless the OTA happens to be pointed directly into or directly away from the wind.  The bigger PW OTAs are all open truss as are the AG Optical Dall-Kirkhams and many RCs.

Bryan


richard payne
 

Plane wave had a big price drop
Richard


On Dec 7, 2020, at 6:43 AM, George LaBelle <george.labelle@...> wrote:

Why not lock the mirror and add an Optec or Starlight Instruments focuser on the back?
--
George
Prineville, Oregon