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 >> Refractors

Pages: 1 | 2 | 3 | (show all)
csrlice12
Postmaster
*****

Reged: 05/22/12

Loc: Denver, CO
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5866658 - 05/17/13 09:02 AM

That scope came with a cheap, but fairly accurate, GoTo mount for $199 at Costco during Christmas season. The scope itself in pretty much the same as the 102HD and have been pretty highly praised for the price. $160 seems a little high.

Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: csrlice12]
      #5866877 - 05/17/13 11:05 AM

It comes with a 2" mirror diagonal. Otherwise it costs $120.

I just don't have the bux for the good scopes right now.

Later this summer maybe I can get a good setup, but for now I'm scopeless save for this low cost OTA.

Craig's list hasn't had anything decent for months now. Mostly kids junk toys or over priced antiques.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5867070 - 05/17/13 12:43 PM

I'd say get the GT OTA from OPT and pop off the existing dovetail rail. The tube rings you have will work, since the only difference is the lens cell/dew shield. Re-lube the CG4 mount with the lithium grease and fill the tripod legs with Bondo to stiffen them. After that you'll have a very useable scope with quite nice optics. Ed Ting did a review of the OTA from OPT and gave it high marks.

http://scopereviews.com/page1af.html


Post Extras: Print Post   Remind Me!   Notify Moderator  
Martin
sage
*****

Reged: 09/09/05

Loc: South Dakota
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5867111 - 05/17/13 12:55 PM

Hi,
Not sure if this was already brought up or not. Can't you just elongate the existing holes in the tube or in the cell with a dremel tool or something and then get the cell to align better with the tube, you will have more adjustment room then.

Martin


Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: Martin]
      #5867601 - 05/17/13 04:26 PM

http://scopereviews.com/page1c.html#10

Hmmm...

Looks like my mounting rings will be too large for a simple plug and play approach.

Quote:

The tube is no longer 114 mm in diameter, it's now 102 mm, which means the OTA isn't baffled as well as before (there are 3 on mine.)




Mine definitely has some good baffles.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5867872 - 05/17/13 06:20 PM

The 114mm tube only applies to the old Vixen C102 with the Great Polaris mount. The C102HD has the 102mm tube which is identical in diameter to the 102gt.

Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: Zamboni]
      #5868048 - 05/17/13 07:57 PM

Yep I just threw a tape measure across the C102HD rings and they're 102mm so I'm good to go.

Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5876121 - 05/21/13 02:53 PM

Well the new OTA should arrive this Thursday and the skies should be clear by Friday.

I'm not going to toss the broken OTA, but it's a lot easier to work on if it's not your only scope. No pressure to get it working asap.

If I still get stumped, I will have a shipping box to send it out for a second opinion from a more experienced astro guy.


Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5883077 - 05/24/13 08:41 PM

Got the new C102-GT OTA yesterday and the Agena collimating eyepiece shows it to be true. Of course I've got a solid cloud deck overhead.

I'll keep peeking outside tonight for any cloud breaks long enough to do some star tests and look at a planet or two.

Most of next week will be cloudy too


Post Extras: Print Post   Remind Me!   Notify Moderator  
Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5884132 - 05/25/13 02:47 PM

Pics or it didn't happen!

Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: Zamboni]
      #5884154 - 05/25/13 03:01 PM

I'll try and get one between rain showers Memorial Day LOL.

Glad I'm not camping this weekend. Brrrrr


Post Extras: Print Post   Remind Me!   Notify Moderator  
audioaficionado
scholastic sledgehammer


Reged: 05/24/12

Loc: Medford, Orygun, USA
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5894832 - 05/31/13 06:35 PM

Saturn looks great! I'll have some good clear nights next week for star testing. Pics of scope to follow.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Zamboni
scholastic sledgehammer
*****

Reged: 01/03/05

Loc: Colorado Springs
Re: Can a Celestron C102-HD Refractor be collimated? new [Re: audioaficionado]
      #5894955 - 05/31/13 08:08 PM

Glad to hear it worked out! When you have a good sample (and pretty much all of them are, these days) those 4" Synta refractors can be really impressive.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | (show all)


Extra information
31 registered and 27 anonymous users are browsing this forum.

Moderator:  Scott in NC, FirstSight, panhard, star drop 

Print Thread

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


Thread views: 2153

Jump to

CN Forums Home


Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics