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Attaching Guidescope to Mount?

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#1 SeattleStarGazer

SeattleStarGazer

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Posted 11 April 2011 - 09:39 AM

Hi all,

I currently have an Orion ST80 Autoguider scope parallel mounted with a Televue NP127is on a CGEM mount. This weight and configuration challenges the limits of the CGEM and my balancing skills. I am thinking it would be great if I could attach the ST80 to the NP127 mount rings directly, but the finder dovetail on the rings is too small for the ST80 mounting bar. Is there hardware that would let me use this arrangement?

Thanks!

#2 michael hester

michael hester

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Posted 11 April 2011 - 02:31 PM

Do the tube rings have piggy back camera mount holes? If so you're in luck, even if one of them has the mount screw in there. I have to assume that the mount rings are like the lower end mount rings you find on most any scope and have that piggyback port on them.

The piggyback port is a 1/4-20 screw as that is standard for all cameras. All you need to do is get 2 more screws like that (at home depot for $1) and use those to bolt the orion dovetail to the top, then bolt the guidescope rings to the dovetail (as they probably already are).

Most scope rings should have some kind of 1/4-20 holes on top of them just for attaching a guide scope to.

Piggyback imo is more stable and definitely easier to setup as there is only one axis to balance instead of two






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