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CG 5 counterweight for Vixen GP DX

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#1 Gianluca67


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Posted 21 July 2009 - 01:13 AM

I wonder whether I can use the standard counterweight of the Celestron CG 5 (5 Kg) with my Vixen GP DX. Does anyone know if the shaft of the GP DX has the same size of the shaft of the CG 5 (20 mm in diameter)?
Thank you for your help.


#2 vinnie


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Posted 21 July 2009 - 04:23 AM

The CW shaft for the GPDX is 19.5mm to accept 20mm weights with clearance

FWIW all the smaller Vixen mounts from the old GP onward accept 20mm weights. Interestingly all the "clones" except the HEQ5 and EQ6 also have the 19.5mm shaft, these two being reduced to 17.5mm, and the Synta Counterweights to suit are merely standard 20mm bored with a plastic sleeve inserted.

So you could use any CW from Celestron/Orion/Skywatcher etc up to and including the EQ6, and if the bore size is too small, its just a matter of popping out the plastic sleeve.

#3 jason_milani



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Posted 21 July 2009 - 06:25 AM

I've replace a GP-DX counterweight shaft with one from an AS-GT and it's a perfect fit. So the weights will fit.

#4 BarrySimon615


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Posted 21 July 2009 - 07:51 AM

Here is a photo of my Vixen Super Polaris DX with CG5 type counterweights (weights repainted to as close to Vixen green as I could get with an automotive lacquer spray paint).

Barry Simon

Attached Files

#5 Gianluca67


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Posted 21 July 2009 - 05:26 PM

Thank you very much to all of you. I will get the new CW this weekend.

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