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flymanwms
member
Reged: 07/06/07
Posts: 29
Loc: Mississippi
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I just purchased an Orion EON 80mm refractor to go with my CPC1100. It has a built-in doveplate, so for now I can mount it on my piggyback adaptor. Ultimately, though, I would like to use a pair of guide rings to move the scope around like a finder scope.
Is this an advisable setup and if so, what Losmandy ring set and mount/plate would be best for my CPC1100? I think I've read where 125mm rings would be a best fit ... ?
Thanks.
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Celestron CPC1100
Mitty wedge (CPC)
Orion EON 80mm refractor
Hyperstar 2
Meade DSI II monochrome
Meade DSI color (one-shot)
Nikon D90
http://astrophotography.ezwebplans.net/
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mclewis1
Thread Killer
Reged: 02/25/06
Posts: 3952
Loc: New Brunswick, Canada
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125mm rings would give you the most flexibility in terms of pointing but you will have to watch for interference between the adjustment bolts and the finder scope(s) you have. You can also use 108mm rings.
As for a mounting bar it depends on what else you might want to do with it (or what else you'll want to mount on it). Some of your popular choices are Scopestuff (simple lightweight and one of the least expensive), ADM MDS, ADM/Losmandy V (Vixen/CG-5 compatible), or ADM/Losmandy D (widest, heaviest and capable of the most options).
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Mark
C11, C6, APM/TMB115, and AT80ED - Tandem mount CGE and CG-5A, WO EZ-Touch and AT Voyager
25x100s and 8x56s, T-Mount Light, Mark 1 eyeballs - Modded 350D, DSI-P, SPC900, Mallincam
Just because you can doesn't necessarily mean that you should
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flymanwms
member
Reged: 07/06/07
Posts: 29
Loc: Mississippi
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Thanks, I've really been stressing over this. For a long while I couldn't even commit to any refractor for fear of later incompatibilities for what all I wanted to do with it. I finally just gritted my teeth and went with the Eon 80mm hoping I could add guide rings later. Any info helps!
Do these mounting bars run the entire length of the optical tube and use pre-existing bolt holes, or do you have to drill new ones?
--------------------
Celestron CPC1100
Mitty wedge (CPC)
Orion EON 80mm refractor
Hyperstar 2
Meade DSI II monochrome
Meade DSI color (one-shot)
Nikon D90
http://astrophotography.ezwebplans.net/
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letimotif
No Complaints
Reged: 05/20/07
Posts: 2016
Loc: Far Flung Isles of Langerhans
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Wander around Anthony's website here:
ADM Site
What you want is an ADM MDS (Anthony Davoli Machining Mini Dovetail System). This is a bar that extends the length of your OTA on the top. The mounting brackets fit exactly for screws already in place on your tube. Once the bar is in place you simply slip the mounting rings onto it and secure with their wing nuts.
You'll also need a set of counterweights. ADM sells those as well. A dovetail bar like the one you mounted on top goes on the ventral side of your OTA. The countweights are attached with a bracket that slides onto this rail. You can move the weights back and forth on this lower rail to achieve balance.
Anthony is a great guy. If you're still not clear about how all this works, just e-mail him and he'll walk you through what you need.
This is not to say you can't get Losmandy, Celestron or Starizona set ups that work just as well. I happen to have ADM on the top side of my CPC and Starizona on the bottom, with Losmandy counterweights because they happened to be on sale at one vendor when I went looking for them. All of these work well, I just happened to be quite impressed with Anthony's attention to detail and quality service.
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flymanwms
member
Reged: 07/06/07
Posts: 29
Loc: Mississippi
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OUTSTANDING !!!
Another question ... should there be any concern about the guide scope possibly falling out from the rings as the CPC slews around into different positions or will it stay locked in ok? It looks like maybe the lens shade and/or the focus knobs could catch it first even if it did slide!
--------------------
Celestron CPC1100
Mitty wedge (CPC)
Orion EON 80mm refractor
Hyperstar 2
Meade DSI II monochrome
Meade DSI color (one-shot)
Nikon D90
http://astrophotography.ezwebplans.net/
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mclewis1
Thread Killer
Reged: 02/25/06
Posts: 3952
Loc: New Brunswick, Canada
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If your guide scope slides in the slightest it will be because you don't have the bolts tightened down enough. A guide scope and autoguiding imager must be mounted absolutely rock solid or you'll suffer from flexure which will show up as lousy guiding (oblong stars etc.).
Those 3 point bolts with delrin tips can be tightened down a surprising amount before there is any chance of deforming the aluminum tube of your EON.
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Mark
C11, C6, APM/TMB115, and AT80ED - Tandem mount CGE and CG-5A, WO EZ-Touch and AT Voyager
25x100s and 8x56s, T-Mount Light, Mark 1 eyeballs - Modded 350D, DSI-P, SPC900, Mallincam
Just because you can doesn't necessarily mean that you should
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flymanwms
member
Reged: 07/06/07
Posts: 29
Loc: Mississippi
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Cool ... I've already ordered the ring kit and the weight kit from the site you mentioned!
Thanks again.
--------------------
Celestron CPC1100
Mitty wedge (CPC)
Orion EON 80mm refractor
Hyperstar 2
Meade DSI II monochrome
Meade DSI color (one-shot)
Nikon D90
http://astrophotography.ezwebplans.net/
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flymanwms
member
Reged: 07/06/07
Posts: 29
Loc: Mississippi
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Correction, from the site the other person mentioned!
--------------------
Celestron CPC1100
Mitty wedge (CPC)
Orion EON 80mm refractor
Hyperstar 2
Meade DSI II monochrome
Meade DSI color (one-shot)
Nikon D90
http://astrophotography.ezwebplans.net/
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jetsfan122
member
Reged: 07/17/09
Posts: 62
Loc: Long Island,New York
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I have the EON 80 mm mounted on my CPC 800 with rings . I'll try to get some pics posted this weekend , so you can see how it would sit in the rings .
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_____________________________
Vinny
_____________________________
Celestron CPC 800
Orion EON 80mm ED APO
Celestron eyepiece kit ( ugh )
Baader Hyperions 8mm,13mm,21mm
Televue Nagler 11mm
Explore Scientific 82 degree ( 18mm )
Agena Astro 38mm
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