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Old Celestar 8 OTA on CG5?

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#1 David Rivas

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Posted 18 May 2009 - 07:47 PM

Hello,
I got a trusty Celestar 8 Deluxe, optically it has always been superb. However as I attach more and more accessories(those ones necessary for planetary imaging), it's prone to vibrations(RA motor vibrations).
I'd like to know if there is a way to attach my Celestar 8 OTA to a CG-5GT ... BTW, it's on "clearance sale" at OPT ( $ 590.00 )
Perhaps someone could tell me if there's a dovetail that fits my Celestar 8(or any other way). If so, where can I purchase what's necessary to mount it properly on it?
Thanks in advance!!
David

#2 LLEEGE

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Posted 18 May 2009 - 08:27 PM

You need a vixen style dovetail for the C8. OPT sells them too.

#3 David Rivas

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Posted 18 May 2009 - 10:01 PM

Thank you very much Luke!
I did see OPT had such dovetails, but I didn't know the CG-5 was a Vixen style one :p
Now, would any vixen style dovetail do the job, or is there any recommended??
Thanks!!!
David

#4 Joe Aguiar

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Posted 18 May 2009 - 10:04 PM

vixen bars are sold by almost every in this hobby, I just measured my Celestron 8 SCT & its 13".

There is one thing though, my Nexstar8 I tried to remove it from the fork arm & put it on the newer SE mount & got a bar just like you are doing but that scope did not have maching holes to put a vixen bar.

So get OPT to look & see if your OTA has holes to put a vixen bar. because the oringinal Nexstar8 was meant for the none removeable fork arm they did not put match holes on the front to back of the ota there were a couple screws holes but it would have been on an angle.

Hope that helps

Joe

#5 Rusty

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Posted 18 May 2009 - 10:32 PM

You'll need "radius blocks" to mate the OTA to the dovetail. Screw holes should match up.

#6 Joe Aguiar

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Posted 18 May 2009 - 10:42 PM

it should match but didn't in my case so better make sure & if you buy the vixen bar from them ask them to install it before shipping it out to you. They should be able to do this if you are buying a bar & OTA.

Joe

#7 Qkslvr

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Posted 19 May 2009 - 06:25 AM

I bought some 8" rings and mounted a dovetail to that to mount my Nexstar 8 OTA on a CG-5, Works just fine.

#8 ibase

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Posted 19 May 2009 - 06:31 AM

David, I used this Vixen-type dovetail bar on my de-forked Nexstar 8 OTA:

http://www.amazon.co...42731777&sr=8-1

and these curved mounting blocks to make unnecessary drilling any hole on the OTA:

http://www.astronomi...product_id/VCB8

No drills used or any holes inflicted whereever; all stock off-the-shelf parts. Does the job and the 8 OTA is now securely perched atop my newly acquired CG-5 GT. Hope this helps.

Best,

#9 ibase

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Posted 19 May 2009 - 06:37 AM

Oops, I mean this dovetail:

http://www.amazon.co...42732927&sr=1-3

#10 David Rivas

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Posted 19 May 2009 - 09:14 AM

Joe, Rusty, Mike, Hernando, THANK YOU SO MUCH TO EACH ONE OF YOU GUYS!!
Now I got more than enough info to ask a lot of questions to OPT... you all have helped me a lot, thanks!!!
Best regards,

David

#11 Joe Aguiar

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Posted 19 May 2009 - 03:41 PM

good luck & let us know how it goes.

Joe

#12 David Rivas

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Posted 20 May 2009 - 01:46 AM

Joe,
Thanks a lot for your kind and valious input!
I will keep you informed once I do the purchase.
THANK YOU!!!
David






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