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Newbie: Can you piggy-back a PST on an ETX?

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#1 Mak2007

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Posted 14 December 2008 - 03:05 PM

Can you mount a Coronado PST on an ETX-125? And, how?

#2 stefanj

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Posted 17 December 2008 - 07:31 PM

sure- anything CAN be done- but the real key is HOW? Short of drilling the OTA (shutter) I don't think there would be many other options. I think my question would be WHY do you want to?

#3 Mak2007

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Posted 17 December 2008 - 08:50 PM

Wow, thank you for your reply; I gave my post as lost in the dark.:bawling:
I would like to buy a PST, and I was thinking to piggy back it on my ETX for tracking the sun... Sounds so bad this idea? :confused:

#4 seeker372011

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Posted 18 December 2008 - 06:28 AM

well maybe a piggyback camera mount and mount the pst on that..the pst is really light so it should be ok..still have you cheacked at wesaners site ? someone may have done this already

#5 stefanj

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Posted 18 December 2008 - 10:48 AM

I guess my biggest fear is that you might be tempted to use the ETX without proper filtering for an alignment- not only could this potentially ruin your scope- but your eyesite would be toasted in a second- As for tracking the sun- well it should work.

#6 CessnaPilot

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Posted 15 November 2010 - 11:21 PM

Sorry to revive this old thread but I am looking to do the same thing as the OP. I have an ETX-125 and a PST. My ETX is my only tracking mount I have and I would like to do some imaging through the PST. Any suggestions?

#7 easye

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Posted 16 November 2010 - 12:08 PM

You could try to get tube rings from scopestuff.com and then mount the PST to the tube ring. How much does the PST weigh? How are you going to counter balance the whole setup?

#8 CessnaPilot

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Posted 16 November 2010 - 12:16 PM

The PST weighs 3 pounds, so it isnt too bad. I have a heavy pair of binoviewers on the ETX which hopefully will counter balance.

#9 blb

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Posted 16 November 2010 - 01:27 PM

NO, NO, NO! counter balance goes on the side opposite the PST so as to take the strain off the gears. To balance the scope about the axis so that if you releace the clutch it does not rotate around, placing the heavy side on the bottom.

#10 Pentax Syntax

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Posted 29 December 2012 - 08:56 AM

I have the PST and have mounted it on the ETX-125 several times using a piggyback mount (originally from Scopetronix but clones are still around). The original mount handled the PST well if balanced properly. I have now put the ETX-125 on the much more stable Celestron SE 6/8 mount and the PST tracks effortlessly on the piggyback mount. I do think that the combination of binoviewer and PST might be a bit much for the old ETX-125 mount. For visual use, the mount was fine.






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