Re: 1200 GTO Dual Scope set up


Dec 22, 2012

 


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#39032 Dec 22, 2012

Does anyone have experience in mounting a second scope on their mount? For discussion assume that the original scope is a 180mm, f/9 APO and that the second is either a 12 or 14-inch Cat or a 10-inch Richy and that the scopes were located in a permanent observatory.



I'm looking for ideas including piggy back and side by side. What components would be needed to make this work?



Thanks,



Frank



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

#39035 Dec 23, 2012

Unfortunately I have nothing to add yet. I am considering the same setup. I am in a domed observatory with a C11 SCT along with an FSQ106ED. I currently have my FSQ106 mounted onto the SCT. I was thinking of doing a side by side to give the FSQ more rigid mounting. One of my concerns was being able to keep the scope within the dome's shutter opening.



All that said I was hoping to follow along with whatever you come up with and I will add to it as I learn more.



Thanks,



Randy



--- In ap-gto@yahoogroups.com, "Frank Angelini" trtags@...> wrote:

>

> Shawn: thank you for the response! This is very close to what I expect my set up to be next year. I understand the balancing challenge. Now, please explain your comment, "The only downside I have discovered is that aligning the two scopes is challenging" Do you mean orthogonal alignment?

>

>

>

> --- In ap-gto@yahoogroups.com, Shawn Preston shawn@> wrote:

> >

> > I run a C14 and WO 98flt side by side. Once balanced (which is a little tricky), it works a charm.

> >

> > For mounting I used all AP plates and saddles. I can dig up the exact part names for you if you need them, but it was essentially a long plate (12-16") on the mount itself, then two saddles on the plate.

> >

> > The only downside I have discovered is that aligning the two scopes is challenging.

> >

> > Shawn

> >

> > Shawn Preston

> > www.skyminer.ca

> >

> >

> > On Dec 22, 2012, at 10:19 AM, "Frank Angelini" trtags@> wrote:

> >

> > > Does anyone have experience in mounting a second scope on their mount? For discussion assume that the original scope is a 180mm, f/9 APO and that the second is either a 12 or 14-inch Cat or a 10-inch Richy and that the scopes were located in a permanent observatory.

> > >

> > > I'm looking for ideas including piggy back and side by side. What components would be needed to make this work?

> > >

> > > Thanks,

> > >

> > > Frank

> > >

> > >

> >

> >

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

> >

>



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#39036 Dec 23, 2012

I have an APM 203mm F6 acromat and a D&G 5" achromat mounted side by side

on my AP 1200. I'm using a Robin Casady tandem bar (18") to hold dovetail

saddles for each telescope. The APM is the heavier of the two scopes at 44

lbs. It required some effort to get the scopes balanced on the mount.

Expect to get a bit of vibration when changing eyepieces with this setup

compared to having a single refractor mounted directly on the AP1200. I am

pleased with this setup.



I have a 10 foot diameter dome and so am limited to one mount.



Tony

On Sat, Dec 22, 2012 at 8:19 AM, Frank Angelini trtags@...> wrote:



> Does anyone have experience in mounting a second scope on their mount?

> For discussion assume that the original scope is a 180mm, f/9 APO and that

> the second is either a 12 or 14-inch Cat or a 10-inch Richy and that the

> scopes were located in a permanent observatory.

>

> I'm looking for ideas including piggy back and side by side. What

> components would be needed to make this work?

>

> Thanks,

>

> Frank

>

>

>

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

>

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

> see groups.yahoo.com/group/ap-gtoYahoo! Groups Links

>

>

>

>





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



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#39039 Dec 23, 2012

Piggybacking 2 large scopes gets unwieldy very quickly. Here's my old side-by-side setup for a C14 and a 150mm aperture camera lens (600mm f4):

www.pbase.com/samirkharusi/image/59549172

and another view:

www.pbase.com/samirkharusi/image/59965890

Robin Cassady has all the plates you need:

www.robincasady.com/Astro/index.html

even an aligner to get 2 scopes to point in the same direction, mainly targetted at the obsessives amongst us?

--- In ap-gto@yahoogroups.com, "Frank Angelini" trtags@...> wrote:

>

> Does anyone have experience in mounting a second scope on their mount? For discussion assume that the original scope is a 180mm, f/9 APO and that the second is either a 12 or 14-inch Cat or a 10-inch Richy and that the scopes were located in a permanent observatory.

>

> I'm looking for ideas including piggy back and side by side. What components would be needed to make this work?

>

> Thanks,

>

> Frank

>



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#39052 Dec 25, 2012

I have a C14 HyperStar with 120mm GuideScope Piggy Back with no issues. I also have had another 130mm scope mounted on the opposite side of the saddle too with no issues on my AP1200 GTO. But I have an Andy Homeyer Saddle. It's the only way. I never could get any images on my setup without flex etc without the saddle and monster dovetail Andy made for me.



You can check out some of my images with this setup at this site.



521839e6-a-62cb3a1a-s-sites.googlegroups.com/site/granitegapastronomer1/home/installation-and-first-light/20120419_112824.jpg?attachauth=ANoY7cqv5KMzSimznPUK8rtd5PDu3v_W5js7XaloQLiZDbJabIMnCGnC4vgxjovsIayGlxQ4QO-fL4iOfCcP1SAmJOhjFyxFpMqo__fYgmTnPjmsjWUTGaBCgidlg2RAWN0xxdya_nNMVGiQ7dphPXn7JSbPX8LEoixw18MDzeaYZHVHImAdjrb8o-EmR9oTAX5YNWYL6FUoP6YOIMqBimM2LumbpGjd2xUjtjsX6Q76wx2U6tI3Tz00IhUlR2zLN6jtR6TBBhrf-OLeiTeRnHSf_CFu6feCiA%3D%3D&attredirects=0







sites.google.com/site/granitegapastronomer1/home/images-from-gg-observatory



John Jennings



--- In ap-gto@yahoogroups.com, David Holko dholko@...> wrote:

>

> Hello,

>

> I have the AP1200, I use a C-14 and at times a 110 mm Refractor, and also a newtonian. It has been my experience to mount scopes one atop another than side by side. I believe side by side will always be heaver just because of the plates needed to make it sturdy.

>

> IMHO, Dave

> On Dec 23, 2012, at 10:31 AM, Randy wrote:

>

> >

> > Unfortunately I have nothing to add yet. I am considering the same setup. I am in a domed observatory with a C11 SCT along with an FSQ106ED. I currently have my FSQ106 mounted onto the SCT. I was thinking of doing a side by side to give the FSQ more rigid mounting. One of my concerns was being able to keep the scope within the dome's shutter opening.

> >

> > All that said I was hoping to follow along with whatever you come up with and I will add to it as I learn more.

> >

> > Thanks,

> >

> > Randy

> >

> > --- In ap-gto@yahoogroups.com, "Frank Angelini" trtags@> wrote:

> > >

> > > Shawn: thank you for the response! This is very close to what I expect my set up to be next year. I understand the balancing challenge. Now, please explain your comment, "The only downside I have discovered is that aligning the two scopes is challenging" Do you mean orthogonal alignment?

> > >

> > >

> > >

> > > --- In ap-gto@yahoogroups.com, Shawn Preston shawn@> wrote:

> > > >

> > > > I run a C14 and WO 98flt side by side. Once balanced (which is a little tricky), it works a charm.

> > > >

> > > > For mounting I used all AP plates and saddles. I can dig up the exact part names for you if you need them, but it was essentially a long plate (12-16") on the mount itself, then two saddles on the plate.

> > > >

> > > > The only downside I have discovered is that aligning the two scopes is challenging.

> > > >

> > > > Shawn

> > > >

> > > > Shawn Preston

> > > > www.skyminer.ca

> > > >

> > > >

> > > > On Dec 22, 2012, at 10:19 AM, "Frank Angelini" trtags@> wrote:

> > > >

> > > > > Does anyone have experience in mounting a second scope on their mount? For discussion assume that the original scope is a 180mm, f/9 APO and that the second is either a 12 or 14-inch Cat or a 10-inch Richy and that the scopes were located in a permanent observatory.

> > > > >

> > > > > I'm looking for ideas including piggy back and side by side. What components would be needed to make this work?

> > > > >

> > > > > Thanks,

> > > > >

> > > > > Frank

> > > > >

> > > > >

> > > >

> > > >

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

> > > >

> > >

> >

> >

> >

>

>

>

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

>






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