Return to the Cloudy Nights Telescope Reviews home pageAstronomics discounts for Cloudy Nights members
· Get a Cloudy Nights T-Shirt · Submit a Review / Article

Click here if you are having trouble logging into the forums

Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User

Equipment Discussions >> Classic Telescopes

Pages: 1
N_DD
member


Reged: 10/21/12

Loc: East Germany
Advice on old C8 new
      #5681466 - 02/15/13 01:15 PM Attachment (20 downloads)

Hi,

I have a second hand (...or maybe third or more?!) black Celestron C8 with a smooth (i. e. not "ribbed") back primary cell. I would like to know which model it is: a quick search through internet suggests it could be an Ultima8, although the one I have is just the OTA with a vixen-style dovetail and a 6x30 finder scope. There is no serial number on the secondary holder. Here is a picture. Could you help me identifying it?

Thanks,

Nico


Post Extras: Print Post   Remind Me!   Notify Moderator  
rmollise
Postmaster
*****

Reged: 07/06/07

Re: Advice on old C8 new [Re: N_DD]
      #5681484 - 02/15/13 01:22 PM

If the finder is original, it ain't an Ultima 8. HOWEVER...the handle spells "Ultima 8," yes.

Post Extras: Print Post   Remind Me!   Notify Moderator  
orion61

*****

Reged: 10/20/07

Loc: Birthplace James T Kirk
Re: Advice on old C8 new [Re: rmollise]
      #5681499 - 02/15/13 01:28 PM

I beleive it is and yes those were some of Celestrons best optics....Untill Now.

Post Extras: Print Post   Remind Me!   Notify Moderator  
N_DD
member


Reged: 10/21/12

Loc: East Germany
Re: Advice on old C8 new [Re: orion61]
      #5681537 - 02/15/13 01:42 PM Attachment (10 downloads)

Thanks Rod and orion61,

hmm, the finder is marked "Japan" (see picture). Not sure if that is original... I suppose the previous owner(s) modded the scope quite a bit. Are there any other features I could look at to tell the model?

Nico


Post Extras: Print Post   Remind Me!   Notify Moderator  
Geo.
Carpal Tunnel
*****

Reged: 10/01/08

Loc: Upstate NY
Re: Advice on old C8 new [Re: N_DD]
      #5682193 - 02/15/13 07:19 PM

There are lots of models this could be from. The smooth back cell dates from 1989. Vixen accessories were being phased out at that time and replaced with stuff from Synta. The dovetail looks like a very rare flanged model designed for the C8's 1.75" O.C. rear cell mounting holes. The only one I've seen was on an early G8 - a C8 on a early Synta CG-5. The diamond knurling on the aluminum focus knob would be appropriate for that period, too. Later production got a rubber knob. I don't recall if the G-8 had the handle. I know the Nexstar 8GPS did.

OTOH the missing trunion arm hole plug screws suggest it was a fork mounted fork OTA. That means it could be ex-Ultima, C8 plus, Celestar 8, Celestar 8 Deluxe or Nexstar 8GPS. If it was an Ultima, Celestar 8 or Deluxe Nexstar 8GPS it should have a Fastar ready secondary cell. Not all C8 plus and Celestar 8 OTAs had Starbright Coatings, most of the others did. If there is an orange plastic cover on the secondary cell, it's not Fastar. Pry off the cover and there should be a serial number. Not to worry, most of these OTAs had pretty good optics. Fair market is about $450.


Post Extras: Print Post   Remind Me!   Notify Moderator  
rmollise
Postmaster
*****

Reged: 07/06/07

Re: Advice on old C8 new [Re: Geo.]
      #5682960 - 02/16/13 08:35 AM

But, again, the tipoff is the rear cell handle. This was _only_ on the Ultima 8. Not on the Celestar, inluding the Deluxe. It is NOT a GPS--the tube is the wrong type and the focuser is wrong. I believe somebody "liberated" the 50mm finder from this U8 at some time.

Edited by rmollise (02/16/13 08:37 AM)


Post Extras: Print Post   Remind Me!   Notify Moderator  
apfever
Carpal Tunnel
*****

Reged: 05/13/08

Loc: Colorado
Re: Advice on old C8 new [Re: rmollise]
      #5683060 - 02/16/13 09:38 AM Attachment (8 downloads)

Nico,

Uncle Rod knows his stuff on SCTs and probably Celestrons in particular. He's the CAT guru.

Now lets get to up front and current. What you have IS a Celestron Ultima8, C8 OTA that has been removed from the forks. Here is a picture of mine and they are identical down to the rear cell mounting holes.

Yours has been removed from the forks. The dovetail rail was added. The reason you have the small finder is that the original one is a bit special illuminated 50mm Polar finder. That finder was probably kept by a previous owner or sold for a premium. You can see it in my picture.

These are indeed nice scopes for optics. The entire original mount, wedge, and tripod are very robust things. When Celestron jumped up to this model, there is a reason it was called the ULTIMA and the name fits. This model was Celestrons response to consumer request for a beefed up version of the C8 for photography stability with attention to excellence. I do not know for sure, but I've heard that Celestron favored this model for choice optics during assembly. Perhaps U. Rod or some one else can comment on that. I have a few Celestron C8, well had 3 ornage tubes at one time, still have one orange and an orange C5, and Meade LX200 8" GPS SMT UHTC NBC CBS and ABC. The Ultima just sneaks in better optical performance that ALL of them in my case.

Want to buy it? I have to let it go, I just have too many scopes. (yep, I said it!)


Post Extras: Print Post   Remind Me!   Notify Moderator  
N_DD
member


Reged: 10/21/12

Loc: East Germany
Re: Advice on old C8 new [Re: apfever]
      #5683206 - 02/16/13 10:53 AM

George, apfever

thanks a lot. As Rod already said, I too believe the finder went its own way. I checked and there are the threaded holes used to attach the OTA to the fork mount at the very same place as in your picture. I just realized that these are through-holes, leaving access to the OTA interior, so I will provide immediately to close them (thanks George for the picture!).
I will assume it is an Ultima 8. I will try and retrieve an original finder to put back on the OTA. At the moment I mounted the scope on a Vixen GP-E, and I have a rather portable setup. I am a bit afraid of a bulky fork mount: do you think it would improve the performance of the setup? Since this is my first scope (...well, excluding the ones I put together as a child using used old binoculars and microscopes...) I am still learning the basics!

Thanks,

Nico


Post Extras: Print Post   Remind Me!   Notify Moderator  
bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Advice on old C8 new [Re: N_DD]
      #5683229 - 02/16/13 11:02 AM

The vixen finders are much better anyway. Just sayin' The 10x40 on my C11 is very sharp and shows fainter stars than the 8x50 on my D&G. The newer 8x50 Vixen on my VMC200 is very good too. Finders are better with F-ratios around 5-6. They have much sharper images than F4 finders.

Post Extras: Print Post   Remind Me!   Notify Moderator  
bob midiri
Carpal Tunnel
*****

Reged: 06/17/04

Loc: pa 19320
Re: Advice on old C8 new [Re: bremms]
      #5683242 - 02/16/13 11:07 AM

Ive had a lot of finders thru the years, but the 10X40 orange finder from my Orange C14 is the sharpest, best finder ever had. bob

Post Extras: Print Post   Remind Me!   Notify Moderator  
jjbird
super member
*****

Reged: 01/17/06

Loc: Wisconsin
Re: Advice on old C8 [Re: apfever]
      #5683812 - 02/16/13 04:13 PM

Neil,
PM sent


Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


Extra information
28 registered and 17 anonymous users are browsing this forum.

Moderator:  Rich (RLTYS), Brian Risley, Chuck Hards 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 505

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics