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Author Topic: PST Extension Tube Removal  (Read 20264 times)

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Offline John Winfield

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Re: PST Extension Tube Removal
« Reply #60 on: 23:34:25, 17 September, 2006 »
So, what happened - got a url or any info more detailed than "trust Arthur"? ;-)
10" LX200R, Pentax SDHF-75 on AP900
ART11002 + TT Filter wheel, DSI Pro.
WO ZS66SD + PST.
Old kit:
C11 on EQ6 mount. Meade SN8 on LXD75 mount, ART285

Offline NickH

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Re: PST Extension Tube Removal
« Reply #61 on: 10:32:32, 18 September, 2006 »
No URL.


Celestron C11: DSI-C/Toucam Pro 2 ICX mod and SC1.5 mod/ Meade LPI/EOS300D/ED80/WO80ZS/Shoestring guider. PST/PST CaK/ART285

No time....always bloomin cloudy...need to build the Obsy..

Offline Ambermile

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Re: PST Extension Tube Removal
« Reply #62 on: 11:16:45, 18 September, 2006 »
I'd like to tell you but then I'd have to kill you :grin:  Stuff in development, a not-so-good coating and a scope with accurate tracking.  1 1/2 hrs and then smoke.  Coating materials now changed significantly.

Arthur

Offline NickH

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Re: PST Extension Tube Removal
« Reply #63 on: 11:18:58, 18 September, 2006 »
Told ya :-)..trust the man...he knows

 ;)
Celestron C11: DSI-C/Toucam Pro 2 ICX mod and SC1.5 mod/ Meade LPI/EOS300D/ED80/WO80ZS/Shoestring guider. PST/PST CaK/ART285

No time....always bloomin cloudy...need to build the Obsy..

Offline John Winfield

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Re: PST Extension Tube Removal
« Reply #64 on: 17:45:24, 18 September, 2006 »
Ah, adpaters not good enough huh - going for the whole thing :-D

Nice one - I'll be interested to see how it turns out.

John
10" LX200R, Pentax SDHF-75 on AP900
ART11002 + TT Filter wheel, DSI Pro.
WO ZS66SD + PST.
Old kit:
C11 on EQ6 mount. Meade SN8 on LXD75 mount, ART285

PBealo

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Re: PST Extension Tube Removal
« Reply #65 on: 13:38:52, 21 October, 2006 »
Gents,

Any further news??

I just bought a PST and happen to have a large ERF already (actually came from Coronado years ago)...so am also interested in how to get the OTA off the scope without damage and in buying, if possible, an adapter to screw the filter/focuser assy onto a larger scope.

PeterB
Sweet Hill Observatory

Offline Ambermile

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Re: PST Extension Tube Removal
« Reply #66 on: 12:18:02, 01 November, 2006 »
Hi Peter

Grab the PST OTA in one hand and the diagonal section in the other.  Unscrew.  Simple - it comes apart leaving the tuner attached to the diagonal section.  Then you just have to connect the diaganol bit to your scope with the erf at the pointy end.

Arthur

Offline Solar B

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Re: PST Extension Tube Removal
« Reply #67 on: 20:50:42, 09 December, 2006 »
can anyone offer advice on avoiding the "prism crunch" as i have already
managed to do this.                                                         brian.

Offline adt175

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Re: PST Extension Tube Removal
« Reply #68 on: 21:27:27, 01 March, 2007 »
can anyone offer advice on avoiding the "prism crunch" as i have already
managed to do this.                                                         brian.
Brian
In the same vein as your suggestion to me, slip 90% in gently from above, and secure with a thumb screw. Less chance of making your eyes water.
Andy
Greetings from Scotland's Capital City!
SW Equinox 120, WO 80mm, LST60, HEQ5 PRO, and incredible skill at smuggling new stuff into the house!

Offline oldfield

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Re: PST Extension Tube Removal
« Reply #69 on: 09:08:46, 29 March, 2007 »
The one bonus I found was the the PST extention tube fitted perfectly into the thread on my Sony TRV camcorder... :-) (Happy days..as it saved me a few quid)

What's the size of that thread?

Offline 1Trev27

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Re: PST Extension Tube Removal
« Reply #70 on: 14:48:21, 28 May, 2007 »
Hey there guys,

Quick question for anyone who may have seen this problem before.

Got my Cool ERF a few weeks ago and have appropriate adaptors and such but have run into a problem with the "new version" pst. Two broken Boa Constrictors so far (full size ones!). This didn't happen with my previous old-style scope so it looks like Coronado are now using a permanent or semi-permanent threadlocker. My question is has anyone managed to remove the extension tube on the new version?

Currently the PST is mounted with a spotting scope and ERF on the front, which works with the previous owner's old style PST. Just won't work with mine because I cannot get enough backfocus without removing the extension tube.

By the way, don't panic; This mod will only be used for imaging as I don't trust the setup without the internal erf  ;)

Many thanks,

Trev

Offline oldfield

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Re: PST Extension Tube Removal
« Reply #71 on: 09:36:07, 25 July, 2007 »
my friend did it, Boa Constrictor is not strong enough, you need pipe clamp, yes, it will scratch the metalic surface, but you have no choice.

 

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