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Mounting 65mm guidescope on 190mm Mak-Newt

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#1 vanc0051

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Posted 09 April 2019 - 10:01 PM

Hello-

 

I want to start autoguiding and was considering mounting my AT65EDQ (6 lbs) as a guidescope on my 190 Mak-Newt (29 lbs with accessories) while using an EQ6-R Pro Mount (44 lbs weight capacity).

 

What would be the best way to mount this 65mm refractor as a guidescope?  

 

Any equipment suggestions would be appreciated.

 

Thanks,

 

-Will



#2 bobzeq25

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Posted 09 April 2019 - 11:01 PM

That's a fairly heavy guidescope.  One thing you do _not_ want to do is use the finder shoe.

 

Are there two threaded holes on top of the scope rings?  The basic idea is to bolt a long something to those, then fasten two rings for the guidescope to the long something.  The twp mounting points, widely spaced, make for a rigid system.

 

This guy has everything you could want.  Pricey, but quality.  There are no doubt cheaper alternatives.  Here's just a bit of his stuff, not everything you'll need.

 

https://www.admacces...-dovetail-ring/


Edited by bobzeq25, 09 April 2019 - 11:03 PM.

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#3 Eric Seavey

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Posted 10 April 2019 - 01:07 AM

I am wondering why you are using such a nice imaging scope as a guide scope.  I've been using the cheap Astromania 50mm with great success with my Mak-Newt.



#4 rkayakr

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Posted 10 April 2019 - 10:31 AM

Here is my SV60 om my MN190. I added a top dovetail bar which is a good idea for stiffness anyway. The scope is carried by adjustable rings on dovetail shoes. If I did it again I'd skip the 3 point adjustments. They are not needed with modern, sensitive guide cameras and they can cause drift if not continually tightened.

 

SV60MountS.jpg


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#5 vanc0051

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Posted 10 April 2019 - 11:55 AM

I am wondering why you are using such a nice imaging scope as a guide scope.  I've been using the cheap Astromania 50mm with great success with my Mak-Newt.

 

I thought of using my Mak-Newt as a primary imaging scope.  However, if I needed wider field images, I could possibly switch the roles of both scopes thus making the Mak-Newt the guidescope and the AT65EDQ the imaging scope.


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#6 Eric Seavey

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Posted 10 April 2019 - 06:15 PM

I thought of using my Mak-Newt as a primary imaging scope.  However, if I needed wider field images, I could possibly switch the roles of both scopes thus making the Mak-Newt the guidescope and the AT65EDQ the imaging scope.

I see, I have a friend who does that with a Celestron C8 and a refractor with decent success.  I am not sure what is easier, switching cameras, refocusing both and changing PHD settings or what I do is just swapping imaging scopes and the cameras, refocus, and plop the autoguider system on the imaging scope and no PHD 2 recalibration needed.

I actually use the autoguider system for the polar alignment in Sharpcap, and use it to find bright stars during the 3-star alignment.

Edited by Eric Seavey, 10 April 2019 - 06:16 PM.



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